Patent US1813053A successfully refreshed from Google Patents.
US1813053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking fillister headset screw
Assignee: SHAKEPROOF LOCK WASHER Co
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Filing: 1929-11-22
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Granted: 1931-07-07
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Expires: 1949-11-22
Abstract
No abstract record available.
Inventors
- 👤 Richard T Hosking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
F; F16; F16B; F16B35/00; F16B35/04; F16B35/06; F16B39/00; F16B39/22; F16B39/28; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/974
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1934-07-06 | 1935-01-05 | 1935-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-07-06 | 1939-01-05 | 1939-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-07-06 | 1943-01-05 | 1943-07-07 | $7700.00 | Window Closed / Lapsed |