US3431852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Position marker
Assignee: United States Department of the Army
•
Filing: 1967-08-15
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Granted: 1969-03-11
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Expires: 1987-08-15
Abstract
No abstract record available.
Inventors
- 👤 Calvin W Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:23
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/56; F42B12/58; F42B12/62; F42B12/625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1434784A
Cited
US1754986A
Cited
US2322624A
Cited
US2348240A
Cited
US2841084A
Cited
US3105438A
Cited
US3298311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |