US2771850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure hydraulic press
Assignee: Douglas Aircraft Co Inc
•
Filing: 1952-03-11
•
Granted: 1956-11-27
•
Expires: 1972-03-11
Abstract
No abstract record available.
Inventors
- 👤 Orville A Wheelon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12; B30; B30B; B30B5/00; B30B5/02; Y; Y10; Y10S; Y10S425/00; Y10S425/019
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1260002A
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US1330711A
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US2281133A
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US2317440A
Cited
US2375599A
Cited
US2385083A
Cited
GB568734A
Cited
US2418393A
Cited
US2493135A
Cited
US2550672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |