US1552860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic auxiliary air-intake valve for internal-combustion engines
Assignee: Individual
•
Filing: 1924-09-25
•
Granted: 1925-09-08
•
Expires: 1944-09-25
Abstract
No abstract record available.
Inventors
- 👤 Major Thomas
- 👤 John J Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:27
CPC Classifications
F; F02; F02M; F02M21/00; F02M2700/00; F02M2700/13; F02M2700/1305; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0923; Y10T137/8593; Y10T137/87917; Y10T137/88062
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) | 1928-09-07 | 1929-03-09 | 1929-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-09-07 | 1933-03-09 | 1933-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-09-07 | 1937-03-09 | 1937-09-08 | $7700.00 | Window Closed / Lapsed |