US2485280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential screw jack
Assignee: Worthington Pump and Machinery Corp
•
Filing: 1947-01-16
•
Granted: 1949-10-18
•
Expires: 1967-01-16
Abstract
No abstract record available.
Inventors
- 👤 John F Grace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:04
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/02; F16L; F16L23/00; F16L23/02; F16L23/036; F16B2200/00; F16B2200/50; F16B2200/506; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53678; Y10T403/00; Y10T403/29; Y10T403/291; Y10T403/297; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18608
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US264020A
Cited
GB189514070A
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US909808A
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US1163679A
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US1128997A
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US1278651A
Cited
US1953172A
Cited
US2070084A
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US2091085A
Cited
US2166106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |