US2873641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screw with cutter to change female thread shape
Assignee: Lock Thread Corp
•
Filing: 1954-04-05
•
Granted: 1959-02-17
•
Expires: 1974-04-05
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:14
CPC Classifications
F; F16; F16B; F16B25/00; F16B25/001; F16B25/0021; F16B25/0036; F16B25/0042; F16B25/0047; F16B25/0078; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |