US2621918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for restoring the stiffness to weakened automobile knee action coil springs
Assignee: Individual
•
Filing: 1950-10-25
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Granted: 1952-12-16
•
Expires: 1970-10-25
Abstract
No abstract record available.
Inventors
- 👤 Tapp Damon Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:46
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/12; F16F1/13
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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |