US2433800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of butadiene
Assignee: Universal Oil Products Co
•
Filing: 1943-10-29
•
Granted: 1947-12-30
•
Expires: 1963-10-29
Abstract
No abstract record available.
Inventors
- 👤 Charles C Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:43
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172534A
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US2271670A
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US2209215A
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GB508764A
Cited
US2265641A
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US2313107A
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US2307240A
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US2367622A
Cited
US2386355A
Cited
US2370797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |