Patent US2914929A successfully refreshed from Google Patents.
US2914929A
Expired / Lapsed
US
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Assemblies including helical splines and coil springs
Assignee: Napier Turbochargers Ltd
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Filing: 1958-05-12
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Granted: 1959-12-01
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Expires: 1978-05-12
Abstract
No abstract record available.
Inventors
- 👤 Bruce M R Irons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:56
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2174342A
Cited
US2371330A
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US2400110A
Cited
US2428128A
Cited
US2691875A
Cited
US2787144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |