US2481037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple torsion spring
Assignee: The J G Wilson Corp
•
Filing: 1946-02-23
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Granted: 1949-09-06
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Expires: 1966-02-23
Abstract
No abstract record available.
Inventors
- 👤 Edward S Pringle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
F; F16; F16F; F16F3/00; F16F3/02; F16F3/04; E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1253; E05D13/1261; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/106; Y; Y10; Y10S; Y10S414/00; Y10S414/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |