US2713467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber for falling object
Assignee: Northrop Grumman Corp
•
Filing: 1950-03-06
•
Granted: 1955-07-19
•
Expires: 1970-03-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/02; B64D1/08; B64D1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1802649A
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US2306321A
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US2399221A
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US2426585A
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US2439236A
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US2489257A
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US2510276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |