Notice of Expiration of Patents Due to Failure to Pay Maintenance Fees 35 U.S.C. 41 and 37 CFR 1.362(g) provide that if the required maintenance 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 applicable surcharge. PATENTS WHICH EXPIRED September 4, 1996 DUE TO FAILURE TO PAY MAINTENANCE FEES Patent Number Serial Number Issue Date Re. 33,231 07/331,247 06/12/90 (4,469,239) (06/542,263) (09/04/84) Re. 33,965 07/369,496 06/16/92 (4,767,805) (07/012,236) (08/30/88) 4,468,820 06/376,707 09/04/84 4,468,830 06/507,591 09/04/84 4,468,832 06/507,590 09/04/84 4,468,833 06/438,763 09/04/84 4,468,837 06/299,541 09/04/84 4,468,838 06/355,581 09/04/84 4,468,846 06/400,662 09/04/84 4,468,856 06/360,660 09/04/84 4,468,862 06/427,909 09/04/84 4,468,864 06/365,261 09/04/84 4,468,867 06/324,151 09/04/84 4,468,871 06/434,565 09/04/84 4,468,873 06/402,070 09/04/84 4,468,874 06/456,714 09/04/84 4,468,877 06/457,657 09/04/84 4,468,885 06/539,707 09/04/84 4,468,890 06/379,320 09/04/84 4,468,893 06/300,981 09/04/84 4,468,900 06/318,708 09/04/84 4,468,910 06/478,142 09/04/84 4,468,913 06/336,366 09/04/84 4,468,921 06/487,826 09/04/84 4,468,923 06/352,300 09/04/84 4,468,924 06/422,863 09/04/84 4,468,927 06/433,238 09/04/84 4,468,928 06/388,218 09/04/84 4,468,945 06/399,912 09/04/84 4,468,949 06/348,123 09/04/84 4,468,950 06/442,591 09/04/84 4,468,956 06/436,872 09/04/84 4,468,972 06/369,540 09/04/84 4,468,975 06/406,511 09/04/84 4,468,977 06/253,587 09/04/84 4,468,979 06/262,247 09/04/84 4,468,982 06/311,017 09/04/84 4,468,983 06/513,496 09/04/84 4,468,984 06/354,268 09/04/84 4,468,986 06/250,429 09/04/84 4,468,987 06/261,811 09/04/84 4,469,004 06/377,450 09/04/84 4,469,005 06/263,035 09/04/84 4,469,006 06/339,224 09/04/84 4,469,008 06/304,937 09/04/84 4,469,009 06/378,232 09/04/84 4,469,011 06/293,989 09/04/84 4,469,012 06/370,745 09/04/84 4,469,013 06/366,156 09/04/84 4,469,016 06/343,625 09/04/84 4,469,023 06/379,905 09/04/84 4,469,024 06/434,875 09/04/84 4,469,028 06/335,249 09/04/84 4,469,035 06/453,887 09/04/84 4,469,050 06/331,767 09/04/84 4,469,053 06/448,763 09/04/84 4,469,064 06/416,044 09/04/84 4,469,066 06/375,855 09/04/84 4,469,068 06/438,724 09/04/84 4,469,071 06/364,315 09/04/84 4,469,078 06/281,944 09/04/84 4,469,085 06/474,380 09/04/84 4,469,089 06/345,263 09/04/84 4,469,103 06/354,361 09/04/84 4,469,106 06/433,931 09/04/84 4,469,119 06/363,000 09/04/84 4,469,122 06/301,745 09/04/84 4,469,124 06/340,376 09/04/84 4,469,127 06/362,401 09/04/84 4,469,129 06/370,824 09/04/84 4,469,137 06/405,424 09/04/84 4,469,143 06/349,171 09/04/84 4,469,170 06/353,795 09/04/84 4,469,176 06/502,093 09/04/84 4,469,179 06/331,641 09/04/84 4,469,181 06/469,086 09/04/84 4,469,187 06/407,865 09/04/84 4,469,188 06/472,083 09/04/84 4,469,190 06/418,962 09/04/84 4,469,194 06/544,018 09/04/84 4,469,197 06/347,782 09/04/84 4,469,215 06/345,803 09/04/84 4,469,223 06/450,116 09/04/84 4,469,225 06/448,409 09/04/84 4,469,229 06/368,681 09/04/84 4,469,230 06/320,952 09/04/84 4,469,235 06/532,175 09/04/84 4,469,244 06/375,128 09/04/84 4,469,252 06/361,418 09/04/84 4,469,255 06/443,161 09/04/84 4,469,259 06/474,480 09/04/84 4,469,267 06/339,298 09/04/84 4,469,282 06/492,549 09/04/84 4,469,283 06/373,102 09/04/84 4,469,284 06/316,217 09/04/84 4,469,290 06/402,611 09/04/84 4,469,294 06/380,480 09/04/84 4,469,298 06/323,143 09/04/84 4,469,301 06/385,987 09/04/84 4,469,302 06/239,215 09/04/84 4,469,306 06/427,743 09/04/84 4,469,307 06/440,466 09/04/84 4,469,310 06/534,672 09/04/84 4,469,317 06/536,826 09/04/84 4,469,321 06/359,191 09/04/84 4,469,323 06/288,375 09/04/84 4,469,330 06/337,881 09/04/84 4,469,334 06/484,563 09/04/84 4,469,346 06/469,963 09/04/84 4,469,350 06/454,157 09/04/84 4,469,356 06/410,896 09/04/84 4,469,364 06/424,009 09/04/84 4,469,365 06/403,062 09/04/84 4,469,366 06/419,083 09/04/84 4,469,374 06/323,662 09/04/84 4,469,378 06/345,865 09/04/84 4,469,390 06/386,633 09/04/84 4,469,393 06/308,319 09/04/84 4,469,400 06/389,796 09/04/84 4,469,402 06/386,255 09/04/84 4,469,403 06/433,757 09/04/84 4,469,406 06/375,822 09/04/84 4,469,408 06/265,628 09/04/84 4,469,415 06/451,017 09/04/84 4,469,429 06/411,572 09/04/84 4,469,436 06/437,780 09/04/84 4,469,445 06/435,639 09/04/84 4,469,452 06/368,379 09/04/84 4,469,475 06/510,429 09/04/84 4,469,477 06/478,241 09/04/84 4,469,479 06/425,297 09/04/84 4,469,482 06/402,077 09/04/84 4,469,483 06/411,177 09/04/84 4,469,484 06/386,435 09/04/84 4,469,496 06/555,991 09/04/84 4,469,504 06/411,134 09/04/84 4,469,509 06/417,960 09/04/84 4,469,511 06/534,716 09/04/84 4,469,515 06/376,989 09/04/84 4,469,518 06/523,253 09/04/84 4,469,520 06/568,994 09/04/84 4,469,537 06/507,687 09/04/84 4,469,538 06/468,777 09/04/84 4,469,539 06/506,584 09/04/84 4,469,545 06/531,671 09/04/84 4,469,557 06/467,393 09/04/84 4,469,573 06/362,773 09/04/84 4,469,578 06/521,876 09/04/84 4,469,580 06/408,373 09/04/84 4,469,584 06/413,629 09/04/84 4,469,590 06/505,213 09/04/84 4,469,591 06/419,682 09/04/84 4,469,594 06/440,981 09/04/84 4,469,602 06/502,967 09/04/84 4,469,606 06/401,475 09/04/84 4,469,609 06/357,029 09/04/84 4,469,611 06/438,546 09/04/84 4,469,614 06/468,044 09/04/84 4,469,619 06/430,952 09/04/84 4,469,627 06/414,688 09/04/84 4,469,628 06/370,437 09/04/84 4,469,636 06/471,409 09/04/84 4,469,638 06/466,813 09/04/84 4,469,639 06/372,498 09/04/84 4,469,641 06/496,628 09/04/84 4,469,643 06/550,750 09/04/84 4,469,644 06/427,409 09/04/84 4,469,650 06/550,984 09/04/84 4,469,655 06/424,408 09/04/84 4,469,657 06/416,825 09/04/84 4,469,661 06/346,636 09/04/84 4,469,662 06/564,362 09/04/84 4,469,663 06/434,676 09/04/84 4,469,666 06/376,501 09/04/84 4,469,669 06/484,887 09/04/84 4,469,678 06/512,110 09/04/84 4,469,682 06/461,843 09/04/84 4,469,683 06/473,921 09/04/84 4,469,685 06/491,844 09/04/84 4,469,689 06/480,603 09/04/84 4,469,690 06/442,051 09/04/84 4,469,698 06/470,301 09/04/84 4,469,706 06/368,112 09/04/84 4,469,708 06/411,073 09/04/84 4,469,714 06/528,801 09/04/84 4,469,718 06/414,667 09/04/84 4,469,720 06/366,497 09/04/84 4,469,727 06/298,911 09/04/84 4,469,734 06/570,445 09/04/84 4,469,739 06/516,517 09/04/84 4,469,744 06/290,866 09/04/84 4,469,745 06/505,443 09/04/84 4,469,748 06/510,715 09/04/84 4,469,755 06/542,751 09/04/84 4,469,757 06/380,187 09/04/84 4,469,762 06/510,255 09/04/84 4,469,763 06/544,244 09/04/84 4,469,771 06/362,176 09/04/84 4,469,779 06/475,773 09/04/84 4,469,782 06/399,929 09/04/84 4,469,787 06/378,126 09/04/84 4,469,790 06/303,517 09/04/84 4,469,791 06/234,140 09/04/84 4,469,792 06/290,174 09/04/84 4,469,796 06/260,684 09/04/84 4,469,799 06/487,965 09/04/84 4,469,801 06/298,109 09/04/84 4,469,803 06/471,198 09/04/84 4,469,812 06/533,145 09/04/84 4,469,826 06/500,556 09/04/84 4,469,827 06/566,331 09/04/84 4,469,828 06/443,363 09/04/84 4,469,840 06/448,590 09/04/84 4,469,844 06/494,708 09/04/84 4,469,845 06/494,709 09/04/84 4,469,847 06/465,143 09/04/84 4,469,851 06/501,672 09/04/84 4,469,852 06/504,442 09/04/84 4,469,855 06/497,224 09/04/84 4,469,860 06/306,188 09/04/84 4,469,870 06/489,681 09/04/84 4,469,873 06/439,092 09/04/84 4,469,878 06/424,636 09/04/84 4,469,879 06/458,038 09/04/84 4,469,881 06/424,783 09/04/84 4,469,882 06/395,068 09/04/84 4,469,885 06/492,843 09/04/84 4,469,893 06/360,533 09/04/84 4,469,895 06/435,814 09/04/84 4,469,896 06/512,085 09/04/84 4,469,903 06/534,226 09/04/84 4,469,904 06/510,858 09/04/84 4,469,905 06/318,217 09/04/84 4,469,917 06/449,756 09/04/84 4,469,918 06/450,497 09/04/84 4,469,919 06/324,154 09/04/84 4,469,921 06/356,546 09/04/84 4,469,922 06/382,765 09/04/84 4,469,924 06/341,153 09/04/84 4,469,933 06/349,553 09/04/84 4,469,943 06/383,852 09/04/84 4,469,944 06/323,334 09/04/84 4,469,945 06/358,542 09/04/84 4,469,946 06/366,417 09/04/84 4,469,956 06/460,655 09/04/84 4,469,964 06/285,207 09/04/84 4,469,970 06/334,352 09/04/84 4,469,972 06/477,110 09/04/84 4,469,974 06/388,400 09/04/84 4,469,983 06/350,036 09/04/84 4,469,993 06/347,715 09/04/84 4,470,005 06/438,431 09/04/84 4,470,008 06/394,836 09/04/84 4,470,012 06/427,771 09/04/84 4,470,015 06/324,866 09/04/84 4,470,019 06/395,429 09/04/84 4,470,020 06/375,659 09/04/84 4,470,021 06/408,586 09/04/84 4,470,031 06/425,176 09/04/84 4,470,035 06/305,733 09/04/84 4,470,038 06/361,247 09/04/84 4,470,040 06/317,800 09/04/84 4,470,041 06/318,223 09/04/84 4,470,043 06/353,537 09/04/84 4,470,050 06/477,982 09/04/84 4,470,051 06/381,923 09/04/84 4,470,054 06/436,237 09/04/84 4,470,064 06/364,154 09/04/84 4,470,066 06/374,452 09/04/84 4,470,071 06/412,902 09/04/84 4,470,075 06/396,470 09/04/84 4,470,081 06/339,352 09/04/84 4,470,084 06/402,771 09/04/84 4,470,085 06/286,028 09/04/84 4,470,087 06/302,630 09/04/84 4,470,088 06/338,445 09/04/84 4,470,097 06/459,794 09/04/84 4,470,099 06/419,205 09/04/84 4,470,101 06/427,277 09/04/84 4,470,105 06/453,424 09/04/84 4,470,108 06/326,251 09/04/84 4,470,109 06/307,251 09/04/84 4,470,131 06/402,738 09/04/84 4,470,132 06/439,807 09/04/84 4,470,134 06/362,352 09/04/84 4,470,138 06/439,232 09/04/84 4,470,144 06/379,505 09/04/84 4,470,146 06/373,549 09/04/84 4,470,148 06/316,716 09/04/84 4,470,154 06/331,678 09/04/84 4,766,608 06/794,567 08/30/88 4,766,613 07/089,140 08/30/88 4,766,615 07/077,813 08/30/88 4,766,619 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