US2833325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countersunk flexible head threaded fastener
Assignee: National Screw and Manufacturing Co
•
Filing: 1954-02-09
•
Granted: 1958-05-06
•
Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Rudyard E Laisy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:31
CPC Classifications
F; F16; F16B; F16B35/00; F16B35/04; F16B35/06; F16B39/00; F16B39/22; F16B39/28; Y; Y10; Y10S; Y10S411/00; Y10S411/919; Y10S411/924; Y10S411/929; Y10S411/955; Y10S411/956; Y10S411/96
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US534850A
Cited
US1637764A
Cited
US2218856A
Cited
US2301590A
Cited
US2527616A
Cited
US2543705A
Cited
US2640521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |