Patent US2983991A successfully refreshed from Google Patents.
US2983991A
Expired / Lapsed
US
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Valve tappet and method of making
Assignee: Old Carco LLC
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Filing: 1956-02-23
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Granted: 1961-05-16
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Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 Carlson Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:15
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; B; B21; B21K; B21K1/00; B21K1/76; B23; B23P; B23P15/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49304
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |