US2965078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston engine unit for submerged operation in wells
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1955-08-04
•
Granted: 1960-12-20
•
Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 John D Chesnut
- 👤 James M Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:07
CPC Classifications
F; F01; F01K; F01K7/00; F01K7/34; F01K7/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US378663A
Cited
US807865A
Cited
US880298A
Cited
GB190615911A
Cited
US870580A
Cited
US1916235A
Cited
US2429035A
Cited
US2653602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |