Patent US1942189A successfully refreshed from Google Patents.
US1942189A
Expired / Lapsed
US
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Mechanism for controlling engine valve mechanisms
Assignee: Individual
•
Filing: 1929-09-12
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Granted: 1934-01-02
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Expires: 1949-09-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Shepard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:23
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; F01; F01L; F01L29/00; F01L29/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18296; Y10T74/18304; Y10T74/18312; Y10T74/18328; Y10T74/18568; Y10T74/18576; Y10T74/18592
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) | 1937-01-01 | 1937-07-03 | 1938-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-01-01 | 1941-07-03 | 1942-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-01-01 | 1945-07-03 | 1946-01-02 | $7700.00 | Window Closed / Lapsed |