US2980977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-loaded clamps
Assignee: Stadium Ltd
•
Filing: 1957-12-16
•
Granted: 1961-04-25
•
Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Charles G Hefford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:30
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/08; F21V21/088; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44291; Y10T24/44376; Y10T24/44385; Y10T24/44427; Y10T24/44436; Y10T24/44453; Y10T24/44462; Y10T24/4447
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1303555A
Cited
US676730A
Cited
US717367A
Cited
US1100486A
Cited
US1777003A
Cited
US2483303A
Cited
US2710912A
Cited
US2815777A
Cited
GB772314A
Cited
US2817989A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |