Patent US4224008A successfully refreshed from Google Patents.
Patent US2152977A successfully refreshed from Google Patents.
US2152977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic lock nut
Assignee: Independent Pneumatic Tool Co
•
Filing: 1936-08-01
•
Granted: 1939-04-04
•
Expires: 1956-08-01
Abstract
No abstract record available.
Inventors
- 👤 Schindel John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:20
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/32; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-04-03 | 1942-10-03 | 1943-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-04-03 | 1946-10-03 | 1947-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-04-03 | 1950-10-03 | 1951-04-04 | $7700.00 | Window Closed / Lapsed |