Patent US2915306A successfully refreshed from Google Patents.
US2915306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber torsion spring
Assignee: Individual
•
Filing: 1955-06-24
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Granted: 1959-12-01
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Expires: 1975-06-24
Abstract
No abstract record available.
Inventors
- 👤 Albert F Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/38; F16F1/3807; F16F1/3821; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/4971
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1924269A
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US2088341A
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US2088342A
Cited
GB465394A
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US2126708A
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US2510644A
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US2468311A
Cited
US2590711A
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 |