US4451645B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
US4451645B1 - - Google Patents
Assignee: Qinetiq Ltd
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Filing: 1982-09-24
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Granted: 1985-09-10
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Expires: 2002-09-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/36; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/37; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/28; C08G59/32; C08G59/3227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |