US3139660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural disconnection apparatus
Assignee: Lockheed Martin Corp
•
Filing: 1961-04-20
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Granted: 1964-07-07
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Expires: 1981-04-20
Abstract
No abstract record available.
Inventors
- 👤 Curtis W Foster
- 👤 Kenyon Wilfred
- 👤 Marvin A Pringle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:12
CPC Classifications
B; B64; B64D; B64D25/00; F; F16; F16B; F16B2200/00; F16B2200/63; Y; Y10; Y10T; Y10T24/00; Y10T24/50; Y10T403/00; Y10T403/16; Y10T403/1633
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2475661A
Cited
US2478019A
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US2763451A
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GB821445A
Cited
US2959443A
Cited
US2974911A
Cited
US3053131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |