US2599249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of copolymerizing ethylene with butadiene
Assignee: Sinclair Refining Co
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Filing: 1950-03-07
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Granted: 1952-06-03
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Expires: 1970-03-07
Abstract
No abstract record available.
Inventors
- 👤 Bernard S Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:02
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C07C2521/00; C07C2521/18; C07C2523/00; C07C2523/70; C07C2523/74; C07C2523/75
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |