Notice of Expiration of Patents Due to Failure to Pay Maintenance Fee 35 U.S.C. 41 and 37 CFR 1.362(g) provide that if the required main- tenance fee and any applicable surcharge are not paid in a patent requiring such payment, the patent will expire at the end of the 4th, 8th or 12th anniversary of the grant of the patent depending on the first maintenance fee which was not paid. According to the records of the Office, the patents listed below have expired due to failure to pay the required maintenance fee and any ap- plicable surcharge. PATENTS WHICH EXPIRED November 19, 1997 DUE TO FAILURE TO PAY MAINTENANCE FEES Patent Number Serial Number Issue Date Re. 33,993 07/612,438 07/14/92 4,880,621 (07/152,376) (11/14/89) 4,553,273 06/555,362 11/19/85 4,553,280 06/602,574 11/19/85 4,553,290 06/577,966 11/19/85 4,553,309 06/654,567 11/19/85 4,553,316 06/588,630 11/19/85 4,553,322 06/610,946 11/19/85 4,553,323 06/563,260 11/19/85 4,553,336 06/494,855 11/19/85 4,553,337 06/568,837 11/19/85 4,553,351 06/473,253 11/19/85 4,553,354 06/614,100 11/19/85 4,553,356 06/587,705 11/19/85 4,553,357 06/587,451 11/19/85 4,553,360 06/514,527 11/19/85 4,553,361 06/627,825 11/19/85 4,553,362 06/458,392 11/19/85 4,553,376 06/521,779 11/19/85 4,553,377 06/615,082 11/19/85 4,553,384 06/683,229 11/19/85 4,553,387 06/406,510 11/19/85 4,553,397 06/506,708 11/19/85 4,553,399 06/597,120 11/19/85 4,553,405 06/559,677 11/19/85 4,553,407 06/560,612 11/19/85 4,553,413 06/574,103 11/19/85 4,553,422 06/678,588 11/19/85 4,553,431 06/605,500 11/19/85 4,553,434 06/524,514 11/19/85 4,553,436 06/440,462 11/19/85 4,553,441 06/543,455 11/19/85 4,553,446 06/547,529 11/19/85 4,553,454 06/555,532 11/19/85 4,553,486 06/453,713 11/19/85 4,553,487 06/619,678 11/19/85 4,553,491 06/646,890 11/19/85 4,553,507 06/404,298 11/19/85 4,553,508 06/456,036 11/19/85 4,553,515 06/659,787 11/19/85 4,553,519 06/650,405 11/19/85 4,553,523 06/445,202 11/19/85 4,553,526 06/584,082 11/19/85 4,553,529 06/396,759 11/19/85 4,553,530 06/610,828 11/19/85 4,553,531 06/604,603 11/19/85 4,553,534 06/505,059 11/19/85 4,553,542 06/504,683 11/19/85 4,553,547 06/634,236 11/19/85 4,553,554 06/530,532 11/19/85 4,553,558 06/584,314 11/19/85 4,553,561 06/623,476 11/19/85 4,553,563 06/677,691 11/19/85 4,553,573 06/543,846 11/19/85 4,553,578 06/696,555 11/19/85 4,553,579 06/618,752 11/19/85 4,553,593 06/618,292 11/19/85 4,553,596 06/518,197 11/19/85 4,553,597 06/515,603 11/19/85 4,553,604 06/537,403 11/19/85 4,553,606 06/439,254 11/19/85 4,553,620 06/550,260 11/19/85 4,553,627 06/663,735 11/19/85 4,553,633 06/640,650 11/19/85 4,553,641 06/534,678 11/19/85 4,553,642 06/542,443 11/19/85 4,553,646 06/612,942 11/19/85 4,553,647 06/597,146 11/19/85 4,553,648 06/630,489 11/19/85 4,553,650 06/472,711 11/19/85 4,553,651 06/528,812 11/19/85 4,553,654 06/475,727 11/19/85 4,553,655 06/556,475 11/19/85 4,553,674 06/344,185 11/19/85 4,553,675 06/444,302 11/19/85 4,553,682 06/597,859 11/19/85 4,553,688 06/579,741 11/19/85 4,553,690 06/511,961 11/19/85 4,553,696 06/430,376 11/19/85 4,553,701 06/436,012 11/19/85 4,553,705 06/584,438 11/19/85 4,553,708 06/438,333 11/19/85 4,553,711 06/623,186 11/19/85 4,553,716 06/659,028 11/19/85 4,553,717 06/560,870 11/19/85 4,553,722 06/491,951 11/19/85 4,553,733 06/458,556 11/19/85 4,553,745 06/719,094 11/19/85 4,553,755 06/570,783 11/19/85 4,553,756 06/523,171 11/19/85 4,553,759 06/680,185 11/19/85 4,553,762 06/510,344 11/19/85 4,553,764 06/686,801 11/19/85 4,553,765 06/667,522 11/19/85 4,553,771 06/493,265 11/19/85 4,553,779 06/615,355 11/19/85 4,553,787 06/555,924 11/19/85 4,553,800 06/434,639 11/19/85 4,553,803 06/607,840 11/19/85 4,553,804 06/607,841 11/19/85 4,553,805 06/573,215 11/19/85 4,553,807 06/588,707 11/19/85 4,553,808 06/727,193 11/19/85 4,553,813 06/494,760 11/19/85 4,553,814 06/531,886 11/19/85 4,553,816 06/467,619 11/19/85 4,553,819 06/625,442 11/19/85 4,553,828 06/510,122 11/19/85 4,553,838 06/368,547 11/19/85 4,553,839 06/463,615 11/19/85 4,553,841 06/465,031 11/19/85 4,553,843 06/592,759 11/19/85 4,553,860 06/529,696 11/19/85 4,553,864 06/491,051 11/19/85 4,553,868 06/588,724 11/19/85 4,553,871 06/585,160 11/19/85 4,553,874 06/679,184 11/19/85 4,553,877 06/359,717 11/19/85 4,553,882 06/539,064 11/19/85 4,553,889 06/528,684 11/19/85 4,553,892 06/435,149 11/19/85 4,553,894 06/563,639 11/19/85 4,553,902 06/601,582 11/19/85 4,553,908 06/258,412 11/19/85 4,553,912 06/580,102 11/19/85 4,553,913 06/607,917 11/19/85 4,553,915 06/689,811 11/19/85 4,553,926 06/549,497 11/19/85 4,553,938 06/550,343 11/19/85 4,553,942 06/671,695 11/19/85 4,553,943 06/595,922 11/19/85 4,553,956 06/635,331 11/19/85 4,553,957 06/491,222 11/19/85 4,553,958 06/463,976 11/19/85 4,553,960 06/632,956 11/19/85 4,553,963 06/610,681 11/19/85 4,553,964 06/584,119 11/19/85 4,553,966 06/533,222 11/19/85 4,553,980 06/725,612 11/19/85 4,553,982 06/708,242 11/19/85 4,553,988 06/443,685 11/19/85 4,553,991 06/617,277 11/19/85 4,553,993 06/575,880 11/19/85 4,553,998 06/623,691 11/19/85 4,553,999 06/600,410 11/19/85 4,554,032 06/645,080 11/19/85 4,554,036 06/607,779 11/19/85 4,554,043 06/618,503 11/19/85 4,554,049 06/618,159 11/19/85 4,554,057 06/466,083 11/19/85 4,554,062 06/623,427 11/19/85 4,554,063 06/606,477 11/19/85 4,554,070 06/537,462 11/19/85 4,554,072 06/655,394 11/19/85 4,554,079 06/548,327 11/19/85 4,554,086 06/604,188 11/19/85 4,554,097 06/594,971 11/19/85 4,554,101 06/461,802 11/19/85 4,554,103 06/513,887 11/19/85 4,554,107 06/626,114 11/19/85 4,554,114 06/303,485 11/19/85 4,554,117 06/444,901 11/19/85 4,554,120 06/627,517 11/19/85 4,554,121 06/532,339 11/19/85 4,554,129 06/359,161 11/19/85 4,554,140 06/644,977 11/19/85 4,554,142 06/433,899 11/19/85 4,554,143 06/514,335 11/19/85 4,554,150 06/542,250 11/19/85 4,554,154 06/588,920 11/19/85 4,554,157 06/614,714 11/19/85 4,554,163 06/520,443 11/19/85 4,554,166 06/589,828 11/19/85 4,554,169 06/711,420 11/19/85 4,554,172 06/628,087 11/19/85 4,554,173 06/521,115 11/19/85 4,554,175 06/589,876 11/19/85 4,554,177 06/629,746 11/19/85 4,554,178 06/644,415 11/19/85 4,554,179 06/625,867 11/19/85 4,554,183 06/665,799 11/19/85 4,554,189 06/563,598 11/19/85 4,554,203 06/709,713 11/19/85 4,554,204 06/548,236 11/19/85 4,554,206 06/717,933 11/19/85 4,554,216 06/466,087 11/19/85 4,554,217 06/652,278 11/19/85 4,554,225 06/594,980 11/19/85 4,554,227 06/583,479 11/19/85 4,554,233 06/539,348 11/19/85 4,554,248 06/440,049 11/19/85 4,554,253 06/461,309 11/19/85 4,554,255 06/511,147 11/19/85 4,554,257 06/489,734 11/19/85 4,554,261 06/633,027 11/19/85 4,554,264 06/631,177 11/19/85 4,554,269 06/573,377 11/19/85 4,554,272 06/695,119 11/19/85 4,554,274 06/615,757 11/19/85 4,554,275 06/560,445 11/19/85 4,554,276 06/538,233 11/19/85 4,554,279 06/478,816 11/19/85 4,554,285 06/449,316 11/19/85 4,554,289 06/564,923 11/19/85 4,554,290 06/618,155 11/19/85 4,554,293 06/725,036 11/19/85 4,554,299 06/722,629 11/19/85 4,554,300 06/722,630 11/19/85 4,554,303 06/681,452 11/19/85 4,554,309 06/620,712 11/19/85 4,554,311 06/699,982 11/19/85 4,554,312 06/699,983 11/19/85 4,554,326 06/481,320 11/19/85 4,554,330 06/621,472 11/19/85 4,554,335 06/584,600 11/19/85 4,554,340 06/703,059 11/19/85 4,554,353 06/637,633 11/19/85 4,554,360 06/594,678 11/19/85 4,554,372 06/642,860 11/19/85 4,554,376 06/659,861 11/19/85 4,554,378 06/468,217 11/19/85 4,554,380 06/644,866 11/19/85 4,554,386 06/595,165 11/19/85 4,554,392 06/668,649 11/19/85 4,554,400 06/630,191 11/19/85 4,554,401 06/618,485 11/19/85 4,554,407 06/625,556 11/19/85 4,554,411 06/460,615 11/19/85 4,554,414 06/565,464 11/19/85 4,554,419 06/557,320 11/19/85 4,554,420 06/606,072 11/19/85 4,554,421 06/719,036 11/19/85 4,554,424 06/614,284 11/19/85 4,554,439 06/674,706 11/19/85 4,554,448 06/487,991 11/19/85 4,554,450 06/452,624 11/19/85 4,554,452 06/514,632 11/19/85 4,554,457 06/512,418 11/19/85 4,554,462 06/474,337 11/19/85 4,554,466 06/445,888 11/19/85 4,554,470 06/618,841 11/19/85 4,554,492 06/688,283 11/19/85 4,554,495 06/645,280 11/19/85 4,554,501 06/604,690 11/19/85 4,554,504 06/605,646 11/19/85 4,554,507 06/439,702 11/19/85 4,554,509 06/644,296 11/19/85 4,554,510 06/531,231 11/19/85 4,554,512 06/644,775 11/19/85 4,554,525 06/471,108 11/19/85 4,554,532 06/455,770 11/19/85 4,554,535 06/515,526 11/19/85 4,554,538 06/498,212 11/19/85 4,554,541 06/531,516 11/19/85 4,554,550 06/497,349 11/19/85 4,554,551 06/497,350 11/19/85 4,554,552 06/333,016 11/19/85 4,554,559 06/504,104 11/19/85 4,554,563 06/531,587 11/19/85 4,554,567 06/477,278 11/19/85 4,554,572 06/505,534 11/19/85 4,554,573 06/563,617 11/19/85 4,554,580 06/503,252 11/19/85 4,554,585 06/522,692 11/19/85 4,554,597 06/548,415 11/19/85 4,554,600 06/648,573 11/19/85 4,554,616 06/627,047 11/19/85 4,554,619 06/658,614 11/19/85 4,554,623 06/578,514 11/19/85 4,554,625 06/504,206 11/19/85 4,554,643 06/647,941 11/19/85 4,554,649 06/344,892 11/19/85 4,554,651 06/384,674 11/19/85 4,554,655 06/469,053 11/19/85 4,554,658 06/511,682 11/19/85 4,554,664 06/539,599 11/19/85 4,554,667 06/546,134 11/19/85 4,879,772 07/108,101 11/14/89 4,879,773 07/194,570 11/14/89 4,879,779 07/255,704 11/14/89 4,879,783 07/223,203 11/14/89 4,879,799 07/168,594 11/14/89 4,879,800 07/225,896 11/14/89 4,879,804 07/252,069 11/14/89 4,879,805 07/233,392 11/14/89 4,879,812 07/238,902 11/14/89 4,879,813 07/179,317 11/14/89 4,879,815 07/256,984 11/14/89 4,879,816 07/261,095 11/14/89 4,879,817 07/116,142 11/14/89 4,879,818 07/301,891 11/14/89 4,879,820 07/227,574 11/14/89 4,879,822 07/198,988 11/14/89 4,879,823 07/202,325 11/14/89 4,879,825 07/216,153 11/14/89 4,879,826 07/274,021 11/14/89 4,879,829 07/266,575 11/14/89 4,879,831 07/179,209 11/14/89 4,879,834 07/255,832 11/14/89 4,879,837 07/142,245 11/14/89 4,879,844 07/073,572 11/14/89 4,879,845 07/328,809 11/14/89 4,879,848 07/230,404 11/14/89 4,879,849 07/116,924 11/14/89 4,879,861 07/183,903 11/14/89 4,879,862 07/130,372 11/14/89 4,879,865 07/226,129 11/14/89 4,879,866 07/211,590 11/14/89 4,879,873 07/225,735 11/14/89 4,879,875 07/171,752 11/14/89 4,879,877 07/222,165 11/14/89 4,879,878 07/182,306 11/14/89 4,879,880 07/297,102 11/14/89 4,879,883 07/230,285 11/14/89 4,879,886 07/186,636 11/14/89 4,879,887 07/173,054 11/14/89 4,879,889 07/101,685 11/14/89 4,879,890 07/242,809 11/14/89 4,879,892 07/241,426 11/14/89 4,879,900 07/215,144 11/14/89 4,879,905 07/255,872 11/14/89 4,879,908 07/166,933 11/14/89 4,879,909 07/105,265 11/14/89 4,879,910 07/088,571 11/14/89 4,879,914 07/316,341 11/14/89 4,879,920 07/037,532 11/14/89 4,879,922 07/039,863 11/14/89 4,879,926 07/238,590 11/14/89 4,879,936 07/085,019 11/14/89 4,879,937 07/149,148 11/14/89 4,879,938 07/308,682 11/14/89 4,879,942 06/658,839 11/14/89 4,879,949 07/195,154 11/14/89 4,879,954 06/462,770 11/14/89 4,879,942 06/658,839 11/14/89 4,879,962 07/216,797 11/14/89 4,879,954 06/462,770 11/14/89 4,879,965 06/616,266 11/14/89 4,879,971 07/204,395 11/14/89 4,879,973 07/214,641 11/14/89 4,879,965 06/616,266 11/14/89 4,879,980 07/247,561 11/14/89 4,879,981 07/238,376 11/14/89 4,879,988 07/270,054 11/14/89 4,879,989 07/102,110 11/14/89 4,879,994 07/146,681 11/14/89 4,880,007 06/884,622 11/14/89 4,880,010 07/170,387 11/14/89 4,880,012 07/144,004 11/14/89 4,880,007 06/884,622 11/14/89 4,880,015 07/202,169 11/14/89 4,880,018 07/080,715 11/14/89 4,880,019 07/170,802 11/14/89 4,880,020 07/142,546 11/14/89 4,880,021 07/148,659 11/14/89 4,880,022 07/243,757 11/14/89 4,880,025 07/346,245 11/14/89 4,880,026 07/226,269 11/14/89 4,880,027 07/134,292 11/14/89 4,880,032 07/368,804 11/14/89 4,880,038 07/146,464 11/14/89 4,880,039 07/356,763 11/14/89 4,880,041 07/177,267 11/14/89 4,880,045 07/169,978 11/14/89 4,880,047 07/202,489 11/14/89 4,880,049 07/199,355 11/14/89 4,880,053 07/341,903 11/14/89 4,880,055 07/280,956 11/14/89 4,880,058 07/194,132 11/14/89 4,880,061 07/108,377 11/14/89 4,880,064 07/117,156 11/14/89 4,880,069 07/238,249 11/14/89 4,880,072 07/153,431 11/14/89 4,880,077 07/264,457 11/14/89 4,880,082 07/200,124 11/14/89 4,880,097 07/173,719 11/14/89 4,880,099 07/259,036 11/14/89 4,880,100 07/192,000 11/14/89 4,880,109 07/122,405 11/14/89 4,880,111 07/250,713 11/14/89 4,880,112 07/228,073 11/14/89 4,880,113 07/229,018 11/14/89 4,880,116 07/196,734 11/14/89 4,880,117 07/234,956 11/14/89 4,880,118 07/303,138 11/14/89 4,880,120 07/229,839 11/14/89 4,880,125 07/184,429 11/14/89 4,880,127 07/318,405 11/14/89 4,880,131 07/120,471 11/14/89 4,880,133 07/224,811 11/14/89 4,880,138 07/267,414 11/14/89 4,880,146 07/203,939 11/14/89 4,880,148 07/161,185 11/14/89 4,880,150 07/199,854 11/14/89 4,880,151 07/264,830 11/14/89 4,880,152 07/142,512 11/14/89 4,880,154 07/034,218 11/14/89 4,880,160 07/197,941 11/14/89 4,880,162 07/207,096 11/14/89 4,880,163 07/149,084 11/14/89 4,880,166 07/150,210 11/14/89 4,880,171 07/233,768 11/14/89 4,880,173 07/334,813 11/14/89 4,880,174 07/216,846 11/14/89 4,880,176 07/066,419 11/14/89 4,880,177 07/266,472 11/14/89 4,880,178 07/228,146 11/14/89 4,880,179 07/296,475 11/14/89 4,880,182 07/294,184 11/14/89 4,880,183 07/239,088 11/14/89 4,880,186 07/109,726 11/14/89 4,880,191 06/814,536 11/14/89 4,880,198 07/036,945 11/14/89 4,880,209 07/231,394 11/14/89 4,880,191 06/814,536 11/14/89 4,880,222 07/109,417 11/14/89 4,880,224 07/259,737 11/14/89 4,880,228 07/257,526 11/14/89 4,880,229 07/175,911 11/14/89 4,880,230 07/212,429 11/14/89 4,880,234 07/220,464 11/14/89 4,880,235 07/261,160 11/14/89 4,880,236 07/192,614 11/14/89 4,880,244 07/300,731 11/14/89 4,880,246 07/274,384 11/14/89 4,880,252 07/199,046 11/14/89 4,880,253 07/143,038 11/14/89 4,880,255 07/289,699 11/14/89 4,880,259 07/199,380 11/14/89 4,880,262 07/020,567 11/14/89 4,880,263 07/230,969 11/14/89 4,880,266 07/215,350 11/14/89 4,880,267 07/097,095 11/14/89 4,880,272 07/202,222 11/14/89 4,880,277 07/252,305 11/14/89 4,880,278 07/134,925 11/14/89 4,880,283 07/141,965 11/14/89 4,880,296 07/057,994 11/14/89 4,880,307 07/215,098 11/14/89 4,880,314 06/875,125 11/14/89 4,880,315 07/270,642 11/14/89 4,880,320 07/166,372 11/14/89 4,880,314 06/875,125 11/14/89 4,880,330 07/114,274 11/14/89 4,880,332 07/235,682 11/14/89 4,880,342 07/207,397 11/14/89 4,880,344 07/221,046 11/14/89 4,880,347 07/171,892 11/14/89 4,880,363 07/202,413 11/14/89 4,880,367 07/204,323 11/14/89 4,880,368 06/544,986 11/14/89 4,880,379 07/249,952 11/14/89 4,880,380 07/108,427 11/14/89 4,880,368 06/544,986 11/14/89 4,880,395 07/282,273 11/14/89 4,880,397 07/277,106 11/14/89 4,880,398 07/233,136 11/14/89 4,880,400 07/159,930 11/14/89 4,880,403 07/108,396 11/14/89 4,880,405 07/130,306 11/14/89 4,880,415 07/160,604 11/14/89 4,880,417 07/109,152 11/14/89 4,880,421 07/123,949 11/14/89 4,880,425 06/618,716 11/14/89 4,880,427 07/201,388 11/14/89 4,880,433 07/007,835 11/14/89 4,880,425 06/618,716 11/14/89 4,880,436 07/123,393 11/14/89 4,880,437 07/171,089 11/14/89 4,880,444 06/815,098 11/14/89 4,880,452 07/289,444 11/14/89 4,880,457 07/170,645 11/14/89 4,880,444 06/815,098 11/14/89 4,880,471 07/209,727 11/14/89 4,880,474 07/105,598 11/14/89 4,880,475 07/167,348 11/14/89 4,880,479 07/204,308 11/14/89 4,880,490 07/107,669 11/14/89 4,880,493 07/207,487 11/14/89 4,880,498 07/296,560 11/14/89 4,880,500 07/236,304 11/14/89 4,880,501 07/230,568 11/14/89 4,880,505 07/275,589 11/14/89 4,880,511 07/050,831 11/14/89 4,880,512 07/259,508 11/14/89 4,880,518 07/329,363 11/14/89 4,880,519 07/198,029 11/14/89 4,880,521 07/312,625 11/14/89 4,880,528 07/188,324 11/14/89 4,880,529 07/192,567 11/14/89 4,880,533 07/204,533 11/14/89 4,880,543 07/214,309 11/14/89 4,880,544 07/269,509 11/14/89 4,880,547 07/169,230 11/14/89 4,880,550 07/237,146 11/14/89 4,880,561 07/038,897 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