US2997751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft door
Assignee: General Dynamics Corp
•
Filing: 1958-02-21
•
Granted: 1961-08-29
•
Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Glen E Mcpherren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:56
CPC Classifications
B; B64; B64C; B64C1/00; B64C1/14; B64C1/1407; B64C1/1423; B64C1/143; Y; Y10; Y10T; Y10T24/00; Y10T24/21; Y10T24/2192; Y10T292/00; Y10T292/08; Y10T292/096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2395852A
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US2564988A
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CH308230A
Cited
US2780384A
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US2832553A
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US2751636A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |