Patent US2615535A successfully refreshed from Google Patents.
US2615535A
Expired / Lapsed
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Direct acting friction shock absorber
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1948-08-12
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Granted: 1952-10-28
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Expires: 1968-08-12
Abstract
No abstract record available.
Inventors
- 👤 Snyder Jacob Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:34
CPC Classifications
F; F16; F16F; F16F7/00; F16F7/08; F16F7/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US736071A
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US1927627A
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US2178527A
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US2237318A
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US2237319A
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US2373508A
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US2389061A
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US2426261A
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US2404666A
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US2562595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |