US1506929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable valve-operating mechanism
Assignee: MURPHY IRON WORKS
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Filing: 1922-05-08
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Granted: 1924-09-02
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Expires: 1942-05-08
Abstract
No abstract record available.
Inventors
- 👤 Frank Y Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:43
CPC Classifications
F; F01; F01L; F01L21/00; F01L21/04
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) | 1927-09-02 | 1928-03-03 | 1928-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-09-02 | 1932-03-03 | 1932-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-09-02 | 1936-03-03 | 1936-09-02 | $7700.00 | Window Closed / Lapsed |