US2436600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production and concentration of butadiene
Assignee: Standard Oil Development Co
•
Filing: 1942-10-31
•
Granted: 1948-02-24
•
Expires: 1962-10-31
Abstract
No abstract record available.
Inventors
- 👤 Edward D Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:53
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/12; C07C11/16; C07C11/167; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1938083A
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US1866800A
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US1948777A
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US2209215A
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GB508764A
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US2265641A
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US2307240A
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US2322122A
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US2371817A
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US2339560A
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US2367622A
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US2386355A
Cited
US2379332A
Cited
US2415006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |