Patent US2397945A successfully refreshed from Google Patents.
US2397945A
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US
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Polymerization of propylene
Assignee: Standard Oil Co
•
Filing: 1942-11-20
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Granted: 1946-04-09
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Expires: 1962-11-20
Abstract
No abstract record available.
Inventors
- 👤 Donald E Burney
- 👤 Ouville Edmond L D
- 👤 Hull Carl Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:24
CPC Classifications
C; C10; C10G; C10G50/00; C10G50/02; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924; Y10S585/925
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-04-08 | 1949-10-08 | 1950-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-08 | 1953-10-08 | 1954-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-08 | 1957-10-08 | 1958-04-09 | $7700.00 | Window Closed / Lapsed |