Patent US1572507A successfully refreshed from Google Patents.
US1572507A
Expired / Lapsed
US
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Air valve for fuel-mixture conduits
Assignee: Stewart Warner Speedometer Corp
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Filing: 1924-02-11
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Granted: 1926-02-09
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Expires: 1944-02-11
Abstract
No abstract record available.
Inventors
- 👤 Florent E Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:33
CPC Classifications
F; F02; F02M; F02M23/00; F02M23/04; F02M23/08; F02M23/09; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/785; Y10T137/7852; Y10T137/7853; Y10T137/7866; Y10T137/7867; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7935
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) | 1929-02-08 | 1929-08-10 | 1930-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-02-08 | 1933-08-10 | 1934-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-02-08 | 1937-08-10 | 1938-02-09 | $7700.00 | Window Closed / Lapsed |