Patent US3989778A successfully refreshed from Google Patents.
Patent US2958233A successfully refreshed from Google Patents.
US2958233A
Expired / Lapsed
US
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Valve indexing mechanism
Assignee: Thew Shovel Co
•
Filing: 1957-11-27
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Granted: 1960-11-01
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Expires: 1977-11-27
Abstract
No abstract record available.
Inventors
- 👤 Johnson Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:44
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/10; F16K11/14; F16K11/18; G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; G05G2009/04703; G05G2009/04707; G05G2009/04766; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87072; Y10T74/00; Y10T74/20; Y10T74/20012; Y10T74/20201; Y10T74/20576; Y10T74/20636
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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |