Patent DE388668C successfully refreshed from Google Patents.
US3022992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsion spring unit
Assignee: MATHER SPRING CO
•
Filing: 1958-10-13
•
Granted: 1962-02-27
•
Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Richard E Hanslip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:39
CPC Classifications
B; B60; B60G; B60G11/00; B60G11/32; B60G11/34; B60G11/44; B60G11/02; B60G11/04; B60G21/00; B60G21/02; B60G21/04; B60G21/05; B60G21/051; B60G21/055; B60G7/00; B60G7/02; B62; B62D; B62D33/00; B62D33/06; B62D33/063; B62D33/067; B60G2200/00; B60G2200/10; B60G2200/13; B60G2200/132; B60G2202/00; B60G2202/10; B60G2202/11; B60G2202/112; B60G2202/116; B60G2202/13; B60G2202/136; B60G2204/00; B60G2204/10; B60G2204/12; B60G2204/121; B60G2204/122; B60G2204/14; B60G2204/143
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |