US2431485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting hydrocarbons
Assignee: Individual
•
Filing: 1945-01-11
•
Granted: 1947-11-25
•
Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 William O Keeling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:52
CPC Classifications
C; C10; C10G; C10G11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1613010A
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US1842318A
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US1984569A
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US2215062A
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US2253607A
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US2129506A
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US2170275A
Cited
US2265510A
Cited
US2249584A
Cited
US2276103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |