Patent US2918929A successfully refreshed from Google Patents.
Patent US2931411A successfully refreshed from Google Patents.
US2931411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw fastener
Assignee: Individual
•
Filing: 1956-06-08
•
Granted: 1960-04-05
•
Expires: 1976-06-08
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Keehan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:21
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/282; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49934; Y10T29/49936
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1928157A
Cited
US1953305A
Cited
US1974150A
Cited
US2041809A
Cited
US2147209A
Cited
US2298552A
Cited
US2405402A
Cited
US2833326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |