Patent US2404372A successfully refreshed from Google Patents.
US2404372A
Expired / Lapsed
US
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Fastening device
Assignee: Elastic Stop Nut Corp
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Filing: 1943-08-13
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Granted: 1946-07-23
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Expires: 1963-08-13
Abstract
No abstract record available.
Inventors
- 👤 Hallock Robert Lay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:45
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/04; F16B37/044; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/969; Y10S425/00; Y10S425/107
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) | 1949-07-22 | 1950-01-21 | 1950-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-22 | 1954-01-21 | 1954-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-22 | 1958-01-21 | 1958-07-23 | $7700.00 | Window Closed / Lapsed |