US1343375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic additional-air valve for combustion-engines
Assignee: Individual
•
Filing: 1918-07-29
•
Granted: 1920-06-15
•
Expires: 1938-07-29
Abstract
No abstract record available.
Inventors
- 👤 Peppercorn Alfred Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:53
CPC Classifications
F; F02; F02M; F02M21/00; F02M2700/00; F02M2700/13; F02M2700/1305; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7748; Y10T137/7749; Y10T137/7837; Y10T137/7904; Y10T137/7905
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) | 1923-06-15 | 1923-12-15 | 1924-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-06-15 | 1927-12-15 | 1928-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-06-15 | 1931-12-15 | 1932-06-15 | $7700.00 | Window Closed / Lapsed |