Patent US1925809A successfully refreshed from Google Patents.
Patent US1452829A successfully refreshed from Google Patents.
US1452829A
Expired / Lapsed
US
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Air auxiliary supply means for internal-combustion engines
Assignee: Individual
•
Filing: 1919-03-04
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Granted: 1923-04-24
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Expires: 1939-03-04
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas A Edison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7786
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) | 1926-04-23 | 1926-10-23 | 1927-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-04-23 | 1930-10-23 | 1931-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-04-23 | 1934-10-23 | 1935-04-24 | $7700.00 | Window Closed / Lapsed |