Patent US2421201A successfully refreshed from Google Patents.
US2421201A
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Fastening means
Assignee: Elastic Stop Nut Corp
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Filing: 1943-04-20
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Granted: 1947-05-27
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Expires: 1963-04-20
Abstract
No abstract record available.
Inventors
- 👤 Hallock Robert Lay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:32
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/04; F16B37/044; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/966; Y10S411/971
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396185A
Cited
GB247576A
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US2144350A
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US2258342A
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US2144553A
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US2252932A
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US2249923A
Cited
US2273648A
Cited
US2283122A
Cited
US2285273A
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US2329158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |