US2594446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip lifter lock
Assignee: Individual
•
Filing: 1945-06-16
•
Granted: 1952-04-29
•
Expires: 1965-06-16
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:53
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7772
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US459212A
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US512313A
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US1341702A
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US1574404A
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US2076042A
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US2063378A
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US2231923A
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US2139185A
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US2201189A
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US2340597A
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US2351887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |