US2428692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of isobutane and isopentane by destructive hydrogenation of petroleum oils
Assignee: Standard Oil Development Co
•
Filing: 1944-01-26
•
Granted: 1947-10-07
•
Expires: 1964-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Alexis Voorhies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:42
CPC Classifications
C; C10; C10G; C10G47/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2232909A
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US2337418A
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US2290189A
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US2319495A
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US2357495A
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US2324762A
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GB550480A
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US2366699A
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US2334553A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |