Patent US2316646A successfully refreshed from Google Patents.
US2316646A
Expired / Lapsed
US
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Valve lifter and spring compressor
Assignee: ZIM Manufacturing Co
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Filing: 1942-05-25
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Granted: 1943-04-13
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Expires: 1962-05-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Berkman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:40
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/24; B25B27/26; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53552; Y10T29/53561; Y10T29/5357; Y10T29/53574
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-04-12 | 1946-10-12 | 1947-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-12 | 1950-10-12 | 1951-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-12 | 1954-10-12 | 1955-04-13 | $7700.00 | Window Closed / Lapsed |