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 January 21, 1998 DUE TO FAILURE TO PAY MAINTENANCE FEES Patent Number Serial Number Issue Date 4,564,956 06/573,282 01/21/86 4,564,963 06/666,625 01/21/86 4,564,972 06/610,398 01/21/86 4,564,981 06/624,409 01/21/86 4,564,990 06/580,845 01/21/86 4,564,993 06/471,193 01/21/86 4,564,995 06/714,055 01/21/86 4,565,010 06/499,345 01/21/86 4,565,018 06/692,101 01/21/86 4,565,027 06/668,949 01/21/86 4,565,031 06/574,881 01/21/86 4,565,035 06/600,731 01/21/86 4,565,052 06/502,013 01/21/86 4,565,053 06/594,695 01/21/86 4,565,069 06/668,321 01/21/86 4,565,091 06/723,894 01/21/86 4,565,092 06/654,577 01/21/86 4,565,094 06/613,423 01/21/86 4,565,101 06/543,412 01/21/86 4,565,102 06/731,330 01/21/86 4,565,107 06/576,401 01/21/86 4,565,111 06/612,639 01/21/86 4,565,113 06/593,481 01/21/86 4,565,115 06/404,118 01/21/86 4,565,119 06/622,659 01/21/86 4,565,122 06/559,960 01/21/86 4,565,125 06/620,760 01/21/86 4,565,139 06/649,558 01/21/86 4,565,140 06/577,579 01/21/86 4,565,141 06/563,198 01/21/86 4,565,142 06/743,124 01/21/86 4,565,147 06/607,537 01/21/86 4,565,153 06/571,259 01/21/86 4,565,159 06/640,026 01/21/86 4,565,164 06/690,180 01/21/86 4,565,166 06/629,336 01/21/86 4,565,174 06/667,746 01/21/86 4,565,188 06/551,958 01/21/86 4,565,203 06/550,766 01/21/86 4,565,204 06/716,901 01/21/86 4,565,206 06/609,112 01/21/86 4,565,208 06/607,156 01/21/86 4,565,212 06/542,337 01/21/86 4,565,221 06/582,575 01/21/86 4,565,224 06/547,006 01/21/86 4,565,225 06/642,542 01/21/86 4,565,227 06/621,117 01/21/86 4,565,228 06/614,688 01/21/86 4,565,234 06/471,010 01/21/86 4,565,235 06/541,573 01/21/86 4,565,245 06/492,867 01/21/86 4,565,247 06/576,820 01/21/86 4,565,248 06/633,750 01/21/86 4,565,249 06/652,541 01/21/86 4,565,254 06/5282,70 01/21/86 4,565,259 06/624,605 01/21/86 4,565,261 06/592,244 01/21/86 4,565,266 06/605,517 01/21/86 4,565,270 06/454,890 01/21/86 4,565,272 06/576,403 01/21/86 4,565,281 06/524,059 01/21/86 4,565,284 06/475,743 01/21/86 4,565,291 06/489,144 01/21/86 4,565,292 06/700,332 01/21/86 4,565,295 06/681,480 01/21/86 4,565,306 06/568,120 01/21/86 4,565,313 06/684,909 01/21/86 4,565,331 06/656,773 01/21/86 4,565,343 06/404,118 01/21/86 4,565,353 06/645,366 01/21/86 4,565,354 06/496,939 01/21/86 4,565,361 06/598,792 01/21/86 4,565,363 06/608,518 01/21/86 4,565,369 06/481,207 01/21/86 4,565,387 06/665,627 01/21/86 4,565,395 06/595,237 01/21/86 4,565,399 06/637,321 01/21/86 4,565,405 06/618,877 01/21/86 4,565,424 06/337,493 01/21/86 4,565,430 06/529,036 01/21/86 4,565,435 06/624,441 01/21/86 4,565,438 06/575,967 01/21/86 4,565,442 06/666,366 01/21/86 4,565,447 06/553,736 01/21/86 4,565,449 06/465,014 01/21/86 4,565,454 06/619,049 01/21/86 4,565,458 06/628,957 01/21/86 4,565,472 06/727,207 01/21/86 4,565,476 06/570,972 01/21/86 4,565,479 06/586,463 01/21/86 4,565,484 06/499,838 01/21/86 4,565,485 06/642,669 01/21/86 4,565,489 06/398,908 01/21/86 4,565,501 06/654,032 01/21/86 4,565,503 06/706,596 01/21/86 4,565,508 06/663,931 01/21/86 4,565,512 06/634,592 01/21/86 4,565,516 06/590,316 01/21/86 4,565,518 06/634,592 01/21/86 4,565,520 06/575,097 01/21/86 4,565,524 06/563,300 01/21/86 4,565,525 06/612,430 01/21/86 4,565,528 06/590,891 01/21/86 4,565,529 06/523,940 01/21/86 4,565,532 06/235,573 01/21/86 4,565,538 06/651,714 01/21/86 4,565,545 06/726,185 01/21/86 4,565,549 06/492,196 01/21/86 4,565,551 06/543,131 01/21/86 4,565,563 06/691,635 01/21/86 4,565,572 06/676,435 01/21/86 4,565,574 06/673,174 01/21/86 4,565,581 06/453,048 01/21/86 4,565,584 06/460,801 01/21/86 4,565,592 06/626,731 01/21/86 4,565,596 06/673,366 01/21/86 4,565,599 06/680,237 01/21/86 4,565,608 06/666,318 01/21/86 4,565,618 06/668,433 01/21/86 4,565,619 06/467,711 01/21/86 4,565,623 06/642,502 01/21/86 4,565,624 06/482,040 01/21/86 4,565,630 06/665,424 01/21/86 4,565,631 06/562,866 01/21/86 4,565,643 06/648,216 01/21/86 4,565,645 06/506,263 01/21/86 4,565,649 06/635,940 01/21/86 4,565,651 06/538,572 01/21/86 4,565,654 06/479,375 01/21/86 4,565,656 06/343,357 01/21/86 4,565,669 06/487,307 01/21/86 4,565,673 06/686,937 01/21/86 4,565,677 06/622,757 01/21/86 4,565,681 06/606,570 01/21/86 4,565,683 06/628,520 01/21/86 4,565,685 06/651,181 01/21/86 4,565,688 06/551,242 01/21/86 4,565,689 06/722,870 01/21/86 4,565,690 06/722,493 01/21/86 4,565,692 06/564,968 01/21/86 4,565,693 06/319,527 01/21/86 4,565,702 06/616,990 01/21/86 4,565,724 06/642,119 01/21/86 4,565,732 06/709,242 01/21/86 4,565,735 06/662,503 01/21/86 4,565,746 06/522,380 01/21/86 4,565,749 06/686,353 01/21/86 4,565,752 06/685,638 01/21/86 4,565,753 06/719,833 01/21/86 4,565,759 06/618,604 01/21/86 4,565,762 06/649,762 01/21/86 4,565,770 06/670,949 01/21/86 4,565,772 06/630,232 01/21/86 4,565,782 06/634,491 01/21/86 4,565,801 06/371,223 01/21/86 4,565,804 06/648,637 01/21/86 4,565,813 06/650,530 01/21/86 4,565,822 06/637,106 01/21/86 4,565,824 06/550,321 01/21/86 4,565,836 06/498,222 01/21/86 4,565,840 06/619,344 01/21/86 4,565,843 06/683,033 01/21/86 4,565,844 06/653,509 01/21/86 4,565,845 06/706,181 01/21/86 4,565,846 06/398,851 01/21/86 4,565,849 06/630,509 01/21/86 4,565,850 06/471,934 01/21/86 4,565,855 06/665,980 01/21/86 4,565,857 06/673,872 01/21/86 4,565,858 06/665,262 01/21/86 4,565,860 06/719,461 01/21/86 4,565,865 06/513,617 01/21/86 4,565,866 06/573,443 01/21/86 4,565,868 06/537,237 01/21/86 4,565,877 06/540,414 01/21/86 4,565,882 06/568,846 01/21/86 4,565,889 06/588,826 01/21/86 4,565,892 06/562,620 01/21/86 4,565,901 06/618,823 01/21/86 4,565,905 06/608,385 01/21/86 4,565,907 06/634,470 01/21/86 4,565,908 06/680,691 01/21/86 4,565,914 06/490,155 01/21/86 4,565,917 06/572,163 01/21/86 4,565,920 06/610,035 01/21/86 4,565,927 06/661,844 01/21/86 4,565,928 06/421,403 01/21/86 4,565,930 06/616,101 01/21/86 4,565,931 06/691,776 01/21/86 4,565,934 06/353,672 01/21/86 4,565,941 06/436,335 01/21/86 4,565,943 06/606,136 01/21/86 4,565,944 06/556,208 01/21/86 4,565,945 06/493,493 01/21/86 4,565,946 06/495,882 01/21/86 4,565,947 06/588,425 01/21/86 4,565,953 06/626,982 01/21/86 4,565,954 06/445,954 01/21/86 4,565,955 06/544,395 01/21/86 4,565,980 06/545,460 01/21/86 4,565,982 06/505,668 01/21/86 4,565,985 06/628,505 01/21/86 4,565,998 06/466,753 01/21/86 4,565,999 06/466,074 01/21/86 4,566,000 06/466,077 01/21/86 4,566,003 06/447,096 01/21/86 4,566,004 06/472,783 01/21/86 4,566,005 06/472,776 01/21/86 4,566,006 06/495,496 01/21/86 4,566,016 06/582,085 01/21/86 4,566,020 06/481,517 01/21/86 4,566,024 06/405,886 01/21/86 4,566,029 06/592,839 01/21/86 4,566,031 06/580,650 01/21/86 4,566,032 06/550,690 01/21/86 4,566,033 06/522,020 01/21/86 4,566,040 06/506,265 01/21/86 4,566,042 06/637,512 01/21/86 4,566,044 06/665,807 01/21/86 4,566,045 06/621,414 01/21/86 4,566,047 06/405,557 01/21/86 4,566,050 06/454,916 01/21/86 4,566,052 06/667,724 01/21/86 4,566,057 06/616,614 01/21/86 4,566,060 06/528,153 01/21/86 4,566,067 06/489,989 01/21/86 4,566,075 06/451,663 01/21/86 4,566,080 06/512,853 01/21/86 4,566,085 06/340,598 01/21/86 4,566,097 06/565,244 01/21/86 4,566,088 06/542,014 01/21/86 4,566,097 06/565,244 01/21/86 4,566,102 06/485,816 01/21/86 4,566,105 06/531,680 01/21/86 4,566,108 08/633,924 01/21/86 4,566,114 06/411,403 01/21/86 4,566,120 06/648,427 01/21/86 4,566,123 06/533,408 01/21/86 4,566,124 06/521,956 01/21/86 4,566,125 06/447,868 01/21/86 4,566,126 06/483,505 01/21/86 4,566,128 06/514,674 01/21/86 4,566,131 06/625,213 01/21/86 4,566,132 06/456,091 01/21/86 4,566,133 06/579,786 01/21/86 4,566,134 06/679,526 01/21/86 4,893,365 07/354,769 01/16/90 4,893,368 07/272,917 01/16/90 4,893,369 07/196,266 01/16/90 4,893,370 07/203,191 01/16/90 4,893,371 07/223,405 01/16/90 4,893,375 07/325,559 01/16/90 4,893,376 07/287,274 01/16/90 4,893,378 07/264,890 01/16/90 4,893,379 07/184,972 01/16/90 4,893,392 07/224,628 01/16/90 4,893,396 07/295,964 01/16/90 4,893,401 07/255,158 01/16/90 4,893,404 07/244,050 01/16/90 4,893,410 07/273,925 01/16/90 4,893,426 07/255,597 01/16/90 4,893,433 07/313,018 01/16/90 4,893,442 07/275,970 01/16/90 4,893,453 07/301,197 01/16/90 4,893,456 07/184,114 01/16/90 4,893,458 07/148,919 01/16/90 4,893,474 07/223,302 01/16/90 4,893,476 07/231,454 01/16/90 4,893,479 07/222,325 01/16/90 4,893,485 07/307,407 01/16/90 4,893,489 07/170,138 01/16/90 4,893,490 07/168,059 01/16/90 4,893,497 07/193,810 01/16/90 4,893,503 07/208,417 01/16/90 4,893,506 07/218,845 01/16/90 4,893,520 07/209,823 01/16/90 4,893,521 07/271,387 01/16/90 4,893,522 07/213,872 01/16/90 4,893,523 07/142,049 01/16/90 4,893,528 07/326,342 01/16/90 4,893,537 07/219,347 01/16/90 4,893,541 07/190,402 01/16/90 4,893,550 07/252,599 01/16/90 4,893,557 06/841,675 01/16/90 4,893,559 07/133,666 01/16/90 4,893,566 07/130,631 01/16/90 4,893,568 07/129,799 01/16/90 4,893,573 07/354,833 01/16/90 4,893,575 07/193,402 01/16/90 4,893,580 07/352,009 01/16/90 4,893,586 07/199,140 01/16/90 4,893,599 07/268,812 01/16/90 4,893,600 07/212,319 01/16/90 4,893,606 07/233,807 01/16/90 4,893,611 07/271,214 01/16/90 4,893,613 07/260,522 01/16/90 4,893,614 07/188,671 01/16/90 4,893,621 06/899,669 01/16/90 4,893,624 07/209,520 01/16/90 4,893,626 06/940,657 01/16/90 4,893,627 07/200,811 01/16/90 4,893,632 07/181,027 01/16/90 4,893,633 07/261,257 01/16/90 4,893,639 06/888,534 01/16/90 4,893,642 07/296,189 01/16/90 4,893,644 07/239,134 01/16/90 4,893,653 07/293,214 01/16/90 4,893,655 07/397,549 01/16/90 4,893,656 07/303,807 01/16/90 4,893,658 07/199,923 01/16/90 4,893,662 07/280,553 01/16/90 4,893,671 07/208,714 01/16/90 4,893,673 06/666,866 01/16/90 4,893,677 07/278,898 01/16/90 4,893,686 07/345,780 01/16/90 4,893,691 07/155,576 01/16/90 4,893,692 07/231,339 01/16/90 4,893,693 07/245,826 01/16/90 4,893,694 07/270,710 01/16/90 4,893,696 07/222,117 01/16/90 4,893,697 07/280,007 01/16/90 4,893,701 07/323,907 01/16/90 4,893,705 07/206,225 01/16/90 4,893,711 07/324,188 01/16/90 4,893,717 07/303,469 01/16/90 4,893,724 07/202,969 01/16/90 4,893,733 07/274,821 01/16/90 4,893,735 07/168,902 01/16/90 4,893,740 07/274,177 01/16/90 4,893,745 07/309,226 01/16/90 4,893,749 07/169,745 01/16/90 4,893,769 07/295,010 01/16/90 4,893,778 07/267,808 01/16/90 4,893,781 07/196,368 01/16/90 4,893,784 07/223,917 01/16/90 4,893,788 07/263,413 01/16/90 4,893,791 07/241,530 01/16/90 4,893,794 07/250,688 01/16/90 4,893,796 07/250,626 01/16/90 4,893,799 07/147,296 01/16/90 4,893,801 07/285,210 01/16/90 4,893,808 07/148,665 01/16/90 4,893,809 06/892,949 01/16/90 4,893,814 07/153,354 01/16/90 4,893,815 07/090,036 01/16/90 4,893,816 07/289,805 01/16/90 4,893,818 07/227,984 01/16/90 4,893,819 07/162,812 01/16/90 4,893,825 07/240,881 01/16/90 4,893,828 07/292,217 01/16/90 4,893,830 07/307,533 01/16/90 4,893,831 06/944,230 01/16/90 4,893,836 07/169,558 01/16/90 4,893,846 07/346,473 01/16/90 4,893,851 07/251,357 01/16/90 4,893,852 07/297,700 01/16/90 4,893,861 07/197,644 01/16/90 4,893,872 07/169,327 01/16/90 4,893,877 07/235,179 01/16/90 4,893,884 07/302,526 01/16/90 4,893,887 06/560,747 01/16/90 4,893,891 07/256,634 01/16/90 4,893,897 07/163,056 01/16/90 4,893,899 07/181,989 01/16/90 4,893,904 07/220,953 01/16/90 4,893,907 07/130,462 01/16/90 4,893,912 06/796,391 01/16/90 4,893,916 07/154,647 01/16/90 4,893,920 07/229,990 01/16/90 4,893,924 07/222,598 01/16/90 4,893,926 07/029,117 01/16/90 4,893,927 07/292,803 01/16/90 4,893,930 07/147,968 01/16/90 4,893,934 07/148,328 01/16/90 4,893,941 07/213,078 01/16/90 4,893,943 07/212,268 01/16/90 4,893,944 07/291,629 01/16/90 4,893,945 07/072,206 01/16/90 4,893,947 07/300,586 01/16/90 4,893,948 07/231,882 01/16/90 4,893,949 07/161,916 01/16/90 4,893,950 07/250,798 01/16/90 4,893,957 07/275,058 01/16/90 4,893,963 07/239,625 01/16/90 4,893,966 07/212,883 01/16/90 4,893,968 07/168,153 01/16/90 4,893,969 07/265,898 01/16/90 4,893,970 07/188,022 01/16/90 4,893,974 07/295,118 01/16/90 4,893,975 07/268,312 01/16/90 4,893,986 06/783,045 01/16/90 4,893,989 07/320,690 01/16/90 4,893,991 07/262,205 01/16/90 4,894,003 07/201,479 01/16/90 4,894,004 07/267,356 01/16/90 4,894,005 07/065,480 01/16/90 4,894,007 07/28,3442 01/16/90 4,894,011 07/265,942 01/16/90 4,894,014 07/237,449 01/16/90 4,894,015 07/238,943 01/16/90 4,894,016 07/211,945 01/16/90 4,894,031 07/196,038 01/16/90 4,894,036 07/229,400 01/16/90 4,894,037 07/139,892 01/16/90 4,894,044 07/249,558 01/16/90 4,894,054 07/208,486 01/16/90 4,894,064 07/267,314 01/16/90 4,894,065 07/163,444 01/16/90 4,894,078 07/252,107 01/16/90 4,894,083 07/161,812 01/16/90 4,894,086 07/190,993 01/16/90 4,894,088 07/133,434 01/16/90 4,894,090 07/163,155 01/16/90 4,894,092 07/038,219 01/16/90 4,894,097 07/140,296 01/16/90 4,894,098 07/225,368 01/16/90 4,894,109 07/227,690 01/16/90 4,894,114 07/292,973 01/16/90 4,894,124 07/268,246 01/16/90 4,894,126 07/145,805 01/16/90 4,894,128 06/860,703 01/16/90 4,894,130 07/278,467 01/16/90 4,894,139 07/198,011 01/16/90 4,894,146 07/196,449 01/16/90 4,894,148 07/043,373 01/16/90 4,894,153 07/276,529 01/16/90 4,894,155 07/181,417 01/16/90 4,894,161 06/927,947 01/16/90 4,894,162 07/187,035 01/16/90 4,894,165 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