US2637337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve for shock absorbers
Assignee: North American Aviation Corp
•
Filing: 1948-09-07
•
Granted: 1953-05-05
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Expires: 1968-09-07
Abstract
No abstract record available.
Inventors
- 👤 Eric L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:00
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/342; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7785; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1986944A
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US1988194A
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US2095112A
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US2114921A
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US2071390A
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US2161811A
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US2148497A
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US2280411A
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US2439118A
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US2367662A
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US2431769A
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US2481713A
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |