US2642809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic apparatus
Assignee: Denison Engineering Co
•
Filing: 1946-02-15
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Granted: 1953-06-23
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Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 Ellis H Born
- 👤 Leroy E Bonnette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:00
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/12; F04B1/26; F04B1/30; F04B1/303; F01; F01B; F01B3/00; F01B3/0032; F01B3/0044; F01B3/0047; F01B3/10; F01B3/103; F01B3/104; F04B1/20; F04B1/2014; F04B1/2042; F04C; F04C5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE285468C
Cited
US924787A
Cited
US1081810A
Cited
US2032079A
Cited
GB442450A
Cited
US2299234A
Cited
GB506684A
Cited
US2288768A
Cited
US2418123A
Cited
US2407013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |