US2594443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring jack
Assignee: Individual
•
Filing: 1947-10-29
•
Granted: 1952-04-29
•
Expires: 1967-10-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas C Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/30; B25B27/308; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53613; Y10T29/53635; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553; Y10T74/1555; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18696; Y10T74/18752; Y10T74/21; Y10T74/2133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US270394A
Cited
US361227A
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US716337A
Cited
US972989A
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US1056848A
Cited
US1878624A
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US1795487A
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US1808625A
Cited
US1898121A
Cited
FR783427A
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 |