The following is a list of “Old Act” patents that issued with the largest time span between the filing date and the issue date. Unissued “Old Act” patents are not published so there may be others which are still pending. Also my data is not completely, so this list is only based on recently issued “Old Act” patents. If you notice any omissions or errors, please let me know.
[List generated June 22, 2013]
| Patent Number | Title | Filing Date | Issue Date | Duration (years) | |
|---|---|---|---|---|---|
| 1 | 1341558 | RADAR JAMMING METHOD AND APPARATUS | 1965-09-22 | 2007-10-23 | 42.11 |
| 2 | 1341487 | INFRARED DECEPTION COUNTERMEASURES SYSTEM | 1967-12-08 | 2005-08-16 | 37.72 |
| 3 | 1341519 | PROSTHETIC VASCULAR GRAFT | 1975-01-16 | 2007-01-02 | 31.98 |
| 4 | 1341533 | MULTIPLE SPECTRAL BAND OPTO-MECHANICAL MODULATO | 1975-09-10 | 2007-07-03 | 31.83 |
| 5 | 1341475 | OPTICAL DETECTION SYSTEM | 1973-06-06 | 2005-03-15 | 31.79 |
| 6 | 1336083 | CONTROL SYSTEMS FOR MOVING BODIES | 1964-06-04 | 1995-06-27 | 31.08 |
| 7 | 1341218 | RADIATION SUPPRESSION | 1971-01-22 | 2001-05-01 | 30.29 |
| 8 | 1336292 | CONTROL SYSTEMS FOR MISSILES AND OTHER MOVING BODIE | 1965-12-06 | 1995-07-11 | 29.61 |
| 9 | 1336085 | MISSILE CONTROL MECHANISM | 1965-12-06 | 1995-06-27 | 29.58 |
| 10 | 1336084 | MISSILE CONTROL SYSTEM | 1965-12-06 | 1995-06-27 | 29.58 |
| 11 | 1336086 | CONTROL SYSTEMS FOR MOVING BODIES | 1966-03-04 | 1995-06-27 | 29.33 |
| 12 | 1341633 | INTERLEUKIN-2 POLYPEPTIDES | 1983-12-15 | 2013-01-29 | 29.15 |
| 13 | 1341604 | DNA SEQUENCES, RECOMBINANT DNA MOLECULES AND PROCESSES FOR PRODUCING HUMAN FIBROBLAST INTERFERON-LIKE POLYPEPTIDE | 1981-04-01 | 2010-05-04 | 29.11 |
| 14 | 1332460 | SONAR TRANSDUCER | 1965-09-28 | 1994-10-11 | 29.05 |
| 15 | 1341638 | FIBROBLAST GROWTH FACTOR | 1986-06-09 | 2014-06-17 | 28.04 |
| 16 | 1341640 | RECOMBINANT FIBROBLAST GROWTH FACTORS | 1986-09-12 | 2014-09-16 | 28.03 |
| 17 | 1341583 | INTERFERONS AND PROCESS FOR THEIR PREPARATION | 1981-06-30 | 2008-11-18 | 27.41 |
| 18 | 1341567 | DNA SEQUENCES, RECOMBINANT DNA MOLECULES AND PROCESSES FOR PRODUCING HUMAN INTERFERON – LIKE POLYPEPTIDE | 1981-01-07 | 2008-02-19 | 27.13 |
| 19 | 1341563 | DNA CODING FOR HUMAN FIBROBLAST INTERFERON POLYPEPTIDE AND RECOMBINANT PLASMI | 1980-10-30 | 2007-12-04 | 27.11 |
| 20 | 1341622 | INSECT RESISTANT PLANT | 1984-09-24 | 2011-10-04 | 27.04 |
| 21 | 1341569 | MICROBIAL PRODUCTION OF HUMAN FIBROBLAST INTERFERON | 1981-09-24 | 2008-03-25 | 26.52 |
| 22 | 1341637 | CHEMILUMINESCENT ACRIDINIUM SALTS | 1987-10-14 | 2014-03-18 | 26.44 |
| 23 | 1341630 | TRANSFORMATION VECTORS ALLOWING EXPRESSION OF FOREIGN POLYPEPTIDE ENDOTOXINS IN PLANT | 1986-01-17 | 2012-06-05 | 26.40 |
| 24 | 1341590 | HUMAN IMMUNE INTERFERON | 1982-10-18 | 2009-02-03 | 26.32 |
| 25 | 1341625 | RECOMBINANT MAMMALIAN GM-CSF, DNA ENCODING MAMMALIAN GM-SCF AND METHODS OF USE THEREON | 1985-11-13 | 2011-12-20 | 26.12 |