Patent US2575641A successfully refreshed from Google Patents.
US2575641A
Expired / Lapsed
US
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Cone grip lock nut
Assignee: Individual
•
Filing: 1947-10-02
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Granted: 1951-11-20
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Expires: 1967-10-02
Abstract
No abstract record available.
Inventors
- 👤 Summers John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:08
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/36; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US181589A
Cited
US204036A
Cited
US652789A
Cited
GB190119636A
Cited
US898432A
Cited
GB167228A
Cited
US1357331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |