US3389902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap-over center spring and method of making
Assignee: Individual
•
Filing: 1966-12-12
•
Granted: 1968-06-25
•
Expires: 1986-12-12
Abstract
No abstract record available.
Inventors
- 👤 William E Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:31
CPC Classifications
H; H01; H01H; H01H5/00; H01H5/04; H01H5/18; B; B29; B29C; B29C67/00; B29C67/0011; F; F16; F16F; F16F1/00; F16F1/02; F16F1/18; F16F1/185; F16F1/32; F16F1/322; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700029A
Cited
FR1125532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |