US1437423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Governing valve for internal-combustion motors
Assignee: HENRY A MAY
•
Filing: 1921-07-05
•
Granted: 1922-12-05
•
Expires: 1941-07-05
Abstract
No abstract record available.
Inventors
- 👤 Harry R Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:03
CPC Classifications
F; F02; F02M; F02M1/00; F02M2700/00; F02M2700/43; F02M2700/4302; F02M2700/4323; Y; Y10; Y10S; Y10S261/00; Y10S261/60
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) | 1925-12-04 | 1926-06-05 | 1926-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-04 | 1930-06-05 | 1930-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-04 | 1934-06-05 | 1934-12-05 | $7700.00 | Window Closed / Lapsed |