US2437638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stud and installation thereof
Assignee: DARDELET THREADLOCK Corp
•
Filing: 1942-10-23
•
Granted: 1948-03-09
•
Expires: 1962-10-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin R Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:56
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/30; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US597000A
Cited
US1016897A
Cited
US1809758A
Cited
US1905869A
Cited
US1982737A
Cited
GB508867A
Cited
US2269476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-09 | 1951-09-08 | 1952-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-09 | 1955-09-08 | 1956-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-09 | 1959-09-08 | 1960-03-09 | $7700.00 | Window Closed / Lapsed |