Patent US2881881A successfully refreshed from Google Patents.
US2881881A
Expired / Lapsed
US
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Bidirectional no-back couplings
Assignee: Curtiss Wright Corp
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Filing: 1957-08-28
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Granted: 1959-04-14
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Expires: 1977-08-28
Abstract
No abstract record available.
Inventors
- 👤 Columbus R Sacchini
- 👤 Donald R Tomko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:49
CPC Classifications
F; F16; F16B; F16B1/00; F16B1/02; F16B1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22852E
Cited
US1537223A
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USRE16565E
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US1829825A
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US1935147A
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US2219877A
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US2421814A
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US2618764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |