US2469751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold starting motor fuel
Assignee: Standard Oil Development Co
•
Filing: 1943-09-01
•
Granted: 1949-05-10
•
Expires: 1963-09-01
Abstract
No abstract record available.
Inventors
- 👤 William J Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:23
CPC Classifications
F; F02; F02N; F02N99/00; F02N99/002; F02N99/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1164357A
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US1183038A
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US1344805A
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US1394921A
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US1431518A
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US1673620A
Cited
US1624139A
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US1990499A
Cited
US2022847A
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US2175743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |