Patent US2864121A successfully refreshed from Google Patents.
US2864121A
Expired / Lapsed
US
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Torsion spring hinge unit
Assignee: MATHER SPRING CO
•
Filing: 1956-01-25
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Granted: 1958-12-16
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Expires: 1976-01-25
Abstract
No abstract record available.
Inventors
- 👤 Lawrence O Imber
- 👤 Richard E Hanslip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:41
CPC Classifications
B; B62; B62D; B62D33/00; B62D33/06; B62D33/063; B62D33/067; B62D33/07; F; F16; F16F; F16F1/00; F16F1/02; F16F1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR1071326A
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US2740487A
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US2774099A
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US2760553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |