US2387731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of diolefins
Assignee: Phillips Petroleum Co
•
Filing: 1943-07-06
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Granted: 1945-10-30
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Expires: 1963-07-06
Abstract
No abstract record available.
Inventors
- 👤 Allen John Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:21
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/20; C10G11/22; B; B01; B01J; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00159; Y; Y10; Y10S; Y10S48/00; Y10S48/05; Y10S585/00; Y10S585/919; Y10S585/921; Y10S585/924
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) | 1948-10-29 | 1949-04-30 | 1949-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-29 | 1953-04-30 | 1953-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-29 | 1957-04-30 | 1957-10-30 | $7700.00 | Window Closed / Lapsed |