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 December 25, 1996
DUE TO FAILURE TO PAY MAINTENANCE FEES
Patent Number Serial Number Issue Date
Re. 32,369 06/785,304 03/10/87
(4,490,721) (06/565,516) (12/25/84)
Re. 32,833 07/004,172 01/17/89
(4,490,358) (06/353,257) (12/25/84)
Re. 33,920 07/390,713 05/12/92
(4,792,797) (07/022,099) (12/20/88)
Re. 34,267 07/630,274) 06/01/93
(4,792,133) (06/939,540) (12/20/88)
Re. 34,410 07/771,905 10/19/93
(4,792,813) (06/896,533) (12/20/88)
4,489,445 06/565,594 12/25/84
4,489,449 06/232,120 12/25/84
4,489,452 06/424,749 12/25/84
4,489,457 06/555,914 12/25/84
4,489,461 06/435,265 12/25/84
4,489,468 06/392,857 12/25/84
4,489,478 06/425,644 12/25/84
4,489,480 06/480,445 12/25/84
4,489,483 06/503,815 12/25/84
4,489,486 06/491,459 12/25/84
4,489,489 06/465,512 12/25/84
4,489,496 06/463,108 12/25/84
4,489,498 06/490,723 12/25/84
4,489,499 06/497,969 12/25/84
4,489,500 06/515,814 12/25/84
4,489,501 06/423,153 12/25/84
4,489,507 06/409,347 12/25/84
4,489,509 06/536,696 12/25/84
4,489,518 06/575,892 12/25/84
4,489,524 06/382,689 12/25/84
4,489,525 06/522,010 12/25/84
4,489,529 06/458,339 12/25/84
4,489,530 06/333,795 12/25/84
4,489,540 06/458,702 12/25/84
4,489,552 06/538,786 12/25/84
4,489,554 06/396,606 12/25/84
4,489,555 06/538,639 12/25/84
4,489,562 06/439,969 12/25/84
4,489,565 06/505,092 12/25/84
4,489,566 06/488,144 12/25/84
4,489,567 06/532,773 12/25/84
4,489,575 06/573,949 12/25/84
4,489,578 06/561,815 12/25/84
4,489,582 06/473,456 12/25/84
4,489,585 06/447,189 12/25/84
4,489,594 06/482,132 12/25/84
4,489,601 06/514,743 12/25/84
4,489,612 06/492,834 12/25/84
4,489,614 06/444,976 12/25/84
4,489,615 06/455,791 12/25/84
4,489,616 06/494,899 12/25/84
4,489,617 06/398,021 12/25/84
4,489,631 06/448,218 12/25/84
4,489,644 06/402,854 12/25/84
4,489,646 06/514,191 12/25/84
4,489,652 06/434,241 12/25/84
4,489,654 06/462,857 12/25/84
4,489,658 06/401,987 12/25/84
4,489,659 06/310,234 12/25/84
4,489,660 06/378,626 12/25/84
4,489,662 06/419,605 12/25/84
4,489,663 06/403,052 12/25/84
4,489,668 06/439,072 12/25/84
4,489,669 06/535,123 12/25/84
4,489,677 06/457,588 12/25/84
4,489,679 06/560,463 12/25/84
4,489,687 06/533,039 12/25/84
4,489,690 06/434,297 12/25/84
4,489,694 06/384,489 12/25/84
4,489,697 06/468,652 12/25/84
4,489,704 06/489,694 12/25/84
4,489,707 06/538,899 12/25/84
4,489,710 06/434,782 12/25/84
4,489,723 06/593,363 12/25/84
4,489,724 06/483,128 12/25/84
4,489,729 06/415,043 12/25/84
4,489,730 06/511,285 12/25/84
4,489,731 06/463,815 12/25/84
4,489,735 06/447,163 12/25/84
4,489,739 06/381,123 12/25/84
4,489,740 06/453,370 12/25/84
4,489,749 06/500,325 12/25/84
4,489,752 06/425,559 12/25/84
4,489,755 06/442,245 12/25/84
4,489,762 06/483,547 12/25/84
4,489,763 06/444,893 12/25/84
4,489,764 06/429,323 12/25/84
4,489,769 06/381,706 12/25/84
4,489,773 06/332,787 12/25/84
4,489,778 06/471,288 12/25/84
4,489,803 06/426,258 12/25/84
4,489,815 06/502,759 12/25/84
4,489,828 06/365,583 12/25/84
4,489,837 06/387,794 12/25/84
4,489,849 06/596,245 12/25/84
4,489,850 06/498,838 12/25/84
4,489,853 06/432,668 12/25/84
4,489,856 06/380,965 12/25/84
4,489,857 06/360,403 12/25/84
4,489,863 06/347,843 12/25/84
4,489,867 06/412,769 12/25/84
4,489,873 06/489,125 12/25/84
4,489,882 06/472,419 12/25/84
4,489,886 06/423,308 12/25/84
4,489,891 06/394,641 12/25/84
4,489,894 06/352,452 12/25/84
4,489,895 06/475,297 12/25/84
4,489,896 06/480,277 12/25/84
4,489,900 06/518,962 12/25/84
4,489,901 06/495,369 12/25/84
4,489,908 06/420,019 12/25/84
4,489,913 06/591,306 12/25/84
4,489,916 06/366,367 12/25/84
4,489,918 06/467,889 12/25/84
4,489,919 06/477,347 12/25/84
4,489,920 06/496,636 12/25/84
4,489,921 06/437,696 12/25/84
4,489,924 06/504,224 12/25/84
4,489,931 06/313,303 12/25/84
4,489,933 06/548,213 12/25/84
4,489,936 06/455,853 12/25/84
4,489,963 06/583,176 12/25/84
4,489,964 06/335,913 12/25/84
4,489,967 06/539,301 12/25/84
4,489,978 06/422,410 12/25/84
4,489,983 06/454,449 12/25/84
4,489,988 06/383,827 12/25/84
4,489,989 06/394,371 12/25/84
4,489,991 06/413,535 12/25/84
4,490,005 06/390,367 12/25/84
4,490,008 06/436,688 12/25/84
4,490,011 06/437,387 12/25/84
4,490,014 06/233,423 12/25/84
4,490,015 06/381,909 12/25/84
4,490,016 06/395,431 12/25/84
4,490,022 06/336,920 12/25/84
4,490,027 06/458,500 12/25/84
4,490,028 06/457,075 12/25/84
4,490,033 06/489,620 12/25/84
4,490,036 06/409,256 12/25/84
4,490,037 06/409,257 12/25/84
4,490,038 06/336,555 12/25/84
4,490,043 06/353,418 12/25/84
4,490,048 06/457,185 12/25/84
4,490,050 06/489,859 12/25/84
4,490,055 06/393,928 12/25/84
4,490,058 06/519,450 12/25/84
4,490,073 06/326,329 12/25/84
4,490,077 06/395,969 12/25/84
4,490,085 06/310,937 12/25/84
4,490,093 06/282,965 12/25/84
4,490,107 06/535,701 12/25/84
4,490,110 06/496,588 12/25/84
4,490,111 06/556,893 12/25/84
4,490,115 06/485,894 12/25/84
4,490,118 06/530,504 12/25/84
4,490,126 06/379,474 12/25/84
4,490,131 06/383,710 12/25/84
4,490,134 06/423,378 12/25/84
4,490,135 06/423,380 12/25/84
4,490,149 06/530,652 12/25/84
4,490,153 06/546,871 12/25/84
4,490,158 06/513,960 12/25/84
4,490,159 06/476,217 12/25/84
4,490,164 06/553,939 12/25/84
4,490,175 06/547,616 12/25/84
4,490,177 06/544,056 12/25/84
4,490,178 06/474,835 12/25/84
4,490,179 06/478,767 12/25/84
4,490,185 06/556,746 12/25/84
4,490,190 06/355,880 12/25/84
4,490,193 06/537,128 12/25/84
4,490,194 06/515,872 12/25/84
4,490,195 06/540,854 12/25/84
4,490,196 06/597,311 12/25/84
4,490,207 06/460,625 12/25/84
4,490,208 06/394,074 12/25/84
4,490,221 06/489,536 12/25/84
4,490,222 06/485,896 12/25/84
4,490,223 06/534,441 12/25/84
4,490,224 06/600,888 12/25/84
4,490,225 06/415,094 12/25/84
4,490,226 06/413,180 12/25/84
4,490,234 06/350,696 12/25/84
4,490,235 06/396,090 12/25/84
4,490,238 06/600,433 12/25/84
4,490,239 06/477,683 12/25/84
4,490,245 06/598,100 12/25/84
4,490,264 06/365,710 12/25/84
4,490,273 06/552,568 12/25/84
4,490,275 06/540,217 12/25/84
4,490,280 06/414,445 12/25/84
4,490,281 06/444,657 12/25/84
4,490,283 06/332,000 12/25/84
4,490,288 06/280,874 12/25/84
4,490,292 06/540,000 12/25/84
4,490,293 06/454,940 12/25/84
4,490,296 06/462,684 12/25/84
4,490,297 06/451,908 12/25/84
4,490,298 06/462,862 12/25/84
4,490,304 06/454,211 12/25/84
4,490,306 06/458,636 12/25/84
4,490,320 06/454,174 12/25/84
4,490,331 06/348,338 12/25/84
4,490,333 06/437,512 12/25/84
4,490,337 06/247,917 12/25/84
4,490,339 06/577,103 12/25/84
4,490,348 06/462,970 12/25/84
4,490,353 06/513,474 12/25/84
4,490,357 06/335,699 12/25/84
4,490,360 06/399,265 12/25/84
4,490,366 06/419,014 12/25/84
4,490,378 06/503,791 12/25/84
4,490,380 06/462,485 12/25/84
4,490,385 06/539,306 12/25/84
4,490,387 06/458,610 12/25/84
4,490,391 06/521,149 12/25/84
4,490,396 06/538,792 12/25/84
4,490,400 06/454,147 12/25/84
4,490,410 06/496,626 12/25/84
4,490,411 06/475,383 12/25/84
4,490,413 06/580,531 12/25/84
4,490,420 06/422,943 12/25/84
4,490,424 06/491,637 12/25/84
4,490,427 06/434,473 12/25/84
4,490,430 06/479,613 12/25/84
4,490,437 06/420,073 12/25/84
4,490,440 06/523,683 12/25/84
4,490,443 06/544,604 12/25/84
4,490,445 06/381,253 12/25/84
4,490,449 06/533,684 12/25/84
4,490,452 06/560,063 12/25/84
4,490,458 06/543,656 12/25/84
4,490,464 06/451,155 12/25/84
4,490,466 06/480,430 12/25/84
4,490,472 06/389,381 12/25/84
4,490,479 06/495,967 12/25/84
4,490,483 06/495,966 12/25/84
4,490,486 06/417,132 12/25/84
4,490,489 06/585,703 12/25/84
4,490,492 06/424,677 12/25/84
4,490,500 06/238,302 12/25/84
4,490,501 06/583,976 12/25/84
4,490,503 06/552,364 12/25/84
4,490,504 06/522,983 12/25/84
4,490,514 06/524,012 12/25/84
4,490,515 06/473,971 12/25/84
4,490,519 06/555,855 12/25/84
4,490,522 06/519,234 12/25/84
4,490,526 06/606,709 12/25/84
4,490,528 06/518,861 12/25/84
4,490,535 06/479,259 12/25/84
4,490,536 06/512,757 12/25/84
4,490,540 06/487,600 12/25/84
4,490,541 06/456,095 12/25/84
4,490,556 06/542,949 12/25/84
4,490,558 06/510,934 12/25/84
4,490,561 06/541,811 12/25/84
4,490,572 06/567,036 12/25/84
4,490,573 06/265,430 12/25/84
4,490,581 06/431,900 12/25/84
4,490,587 06/482,832 12/25/84
4,490,588 06/434,952 12/25/84
4,490,590 06/461,979 12/25/84
4,490,594 06/472,490 12/25/84
4,490,595 06/464,898 12/25/84
4,490,601 06/469,668 12/25/84
4,490,605 06/337,917 12/25/84
4,490,608 06/311,474 12/25/84
4,490,619 06/475,913 12/25/84
4,490,620 06/531,808 12/25/84
4,490,625 06/526,342 12/25/84
4,490,632 06/324,180 12/25/84
4,490,633 06/335,027 12/25/84
4,490,641 06/278,729 12/25/84
4,490,647 06/445,209 12/25/84
4,490,655 06/425,012 12/25/84
4,490,662 06/517,813 12/25/84
4,490,671 06/432,147 12/25/84
4,490,676 06/336,142 12/25/84
4,490,678 06/377,985 12/25/84
4,490,682 06/330,905 12/25/84
4,490,686 06/394,991 12/25/84
4,490,687 06/450,632 12/25/84
4,490,702 06/477,579 12/25/84
4,490,703 06/402,655 12/25/84
4,490,704 06/532,080 12/25/84
4,490,705 06/469,289 12/25/84
4,490,707 06/539,396 12/25/84
4,490,710 06/439,360 12/25/84
4,490,711 06/332,573 12/25/84
4,490,717 06/386,761 12/25/84
4,490,722 06/370,070 12/25/84
4,490,724 06/405,216 12/25/84
4,490,731 06/443,410 12/25/84
4,490,733 06/434,791 12/25/84
4,490,735 06/413,231 12/25/84
4,490,743 06/378,569 12/25/84
4,490,744 06/407,926 12/25/84
4,490,749 06/322,974 12/25/84
4,490,750 06/585,638 12/25/84
4,490,752 06/363,795 12/25/84
4,490,754 06/371,474 12/25/84
4,490,760 06/340,367 12/25/84
4,490,773 06/562,627 12/25/84
4,490,775 06/381,257 12/25/84
4,490,783 06/280,048 12/25/84
4,490,791 06/369,531 12/25/84
4,490,794 06/339,951 12/25/84
4,490,795 06/345,011 12/25/84
4,490,797 06/340,141 12/25/84
4,490,815 06/316,642 12/25/84
4,490,820 06/403,315 12/25/84
4,490,823 06/472,704 12/25/84
4,490,826 06/379,708 12/25/84
4,490,831 06/471,220 12/25/84
4,490,842 06/379,546 12/25/84
4,490,844 06/483,506 12/25/84
4,791,685 07/029,976 12/20/88
4,791,690 07/039,694 12/20/88
4,791,692 07/058,518 12/20/88
4,791,695 07/072,541 12/20/88
4,791,699 06/878,050 12/20/88
4,791,700 07/139,018 12/20/88
4,791,704 07/016,092 12/20/88
4,791,706 07/052,591 12/20/88
4,791,710 07/029,268 12/20/88
4,791,711 07/126,234 12/20/88
4,791,713 07/013,155 12/20/88
4,791,716 07/031,993 12/20/88
4,791,718 06/911,620 12/20/88
4,791,724 07/057,988 12/20/88
4,791,726 07/104,845 12/20/88
4,791,727 07/110,427 12/20/88
4,791,730 07/014,721 12/20/88
4,791,737 07/066,824 12/20/88
4,791,742 07/050,339 12/20/88
4,791,743 07/117,505 12/20/88
4,791,744 06/674,342 12/20/88
4,791,745 07/028,678 12/20/88
4,791,747 07/131,077 12/20/88
4,791,751 07/078,108 12/20/88
4,791,753 07/101,743 12/20/88
4,791,754 07/072,766 12/20/88
4,791,755 06/932,197 12/20/88
4,791,762 07/056,778 12/20/88
4,791,763 07/081,483 12/20/88
4,791,764 07/096,619 12/20/88
4,791,767 07/128,220 12/20/88
4,791,768 07/069,973 12/20/88
4,791,772 07/045,097 12/20/88
4,791,776 07/089,416 12/20/88
4,791,779 07/089,089 12/20/88
4,791,781 07/034,335 12/20/88
4,791,783 06/325,156 12/20/88
4,791,789 07/118,413 12/20/88
4,791,793 07/092,545 12/20/88
4,791,797 07/161,227 12/20/88
4,791,801 07/080,928 12/20/88
4,791,802 07/063,169 12/20/88
4,791,805 06/742,462 12/20/88
4,791,808 07/124,586 12/20/88
4,791,810 07/039,271 12/20/88
4,791,811 07/079,685 12/20/88
4,791,812 06/530,331 12/20/88
4,791,813 07/090,692 12/20/88
4,791,814 07/123,323 12/20/88
4,791,816 07/090,230 12/20/88
4,791,820 07/080,621 12/20/88
4,791,823 07/072,998 12/20/88
4,791,830 06/945,294 12/20/88
4,791,838 06/930,342 12/20/88
4,791,839 06/869,178 12/20/88
4,791,845 07/043,912 12/20/88
4,791,848 07/133,655 12/20/88
4,791,850 06/835,878 12/20/88
4,791,852 07/072,266 12/20/88
4,791,854 07/020,908 12/20/88
4,791,860 07/044,705 12/20/88
4,791,867 06/844,862 12/20/88
4,791,872 07/031,352 12/20/88
4,791,874 06/931,897 12/20/88
4,791,875 07/076,517 12/20/88
4,791,879 06/917,256 12/20/88
4,791,880 07/051,335 12/20/88
4,791,885 06/750,009 12/20/88
4,791,886 07/071,485 12/20/88
4,791,890 07/033,576 12/20/88
4,791,891 07/028,602 12/20/88
4,791,894 06/881,336 12/20/88
4,791,896 07/025,071 12/20/88
4,791,899 07/006,481 12/20/88
4,791,901 06/759,784 12/20/88
4,791,904 07/111,365 12/20/88
4,791,906 06/947,718 12/20/88
4,791,911 06/869,240 12/20/88
4,791,916 07/045,589 12/20/88
4,791,918 06/912,998 12/20/88
4,791,919 06/822,035 12/20/88
4,791,921 07/058,779 12/20/88
4,791,925 07/108,103 12/20/88
4,791,943 06/899,473 12/20/88
4,791,948 07/159,728 12/20/88
4,791,952 07/146,983 12/20/88
4,791,957 07/026,755 12/20/88
4,791,959 07/074,654 12/20/88
4,791,961 07/173,362 12/20/88
4,791,967 07/014,778 12/20/88
4,791,968 07/132,415 12/20/88
4,791,972 07/025,487 12/20/88
4,791,982 07/035,592 12/20/88
4,791,984 07/042,253 12/20/88
4,791,985 07/095,569 12/20/88
4,791,987 07/044,410 12/20/88
4,791,992 07/086,569 12/20/88
4,791,995 07/142,441 12/20/88
4,791,998 06/935,510 12/20/88
4,792,006 07/099,478 12/20/88
4,792,011 07/147,011 12/20/88
4,792,013 07/093,832 12/20/88
4,792,026 07/078,107 12/20/88
4,792,029 06/808,450 12/20/88
4,792,032 06/879,341 12/20/88
4,792,040 07/103,608 12/20/88
4,792,048 07/132,157 12/20/88
4,792,057 06/764,765 12/20/88
4,792,071 07/060,035 12/20/88
4,792,072 07/107,578 12/20/88
4,792,073 07/183,396 12/20/88
4,792,079 07/130,053 12/20/88
4,792,083 07/126,704 12/20/88
4,792,099 07/043,786 12/20/88
4,792,100 07/145,067 12/20/88
4,792,101 06/938,887 12/20/88
4,792,104 07/047,665 12/20/88
4,792,105 07/059,928 12/20/88
4,792,109 07/112,442 12/20/88
4,792,122 07/065,884 12/20/88
4,792,124 07/154,295 12/20/88
4,792,134 07/121,355 12/20/88
4,792,138 06/940,724 12/20/88
4,792,141 07/040,292 12/20/88
4,792,144 07/045,030 12/20/88
4,792,145 06/914,027 12/20/88
4,792,147 07/191,418 12/20/88
4,792,152 06/927,441 12/20/88
4,792,153 06/903,623 12/20/88
4,792,157 06/914,875 12/20/88
4,792,167 06/927,244 12/20/88
4,792,172 07/032,320 12/20/88
4,792,173 07/115,243 12/20/88
4,792,174 07/076,073 12/20/88
4,792,177 07/103,747 12/20/88
4,792,180 07/010,241 12/20/88
4,792,181 07/078,672 12/20/88
4,792,183 07/114,041 12/20/88
4,792,185 07/060,145 12/20/88
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5,173,929 07/783,736 12/22/92
5,173,930 07/803,268 12/22/92
5,173,943 07/811,265 12/22/92
5,173,962 07/790,526 12/22/92