Patent US2403672A successfully refreshed from Google Patents.
US2403672A
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Separation of olefins
Assignee: Phillips Petroleum Co
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Filing: 1943-11-13
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Granted: 1946-07-09
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Expires: 1963-11-13
Abstract
No abstract record available.
Inventors
- 👤 Maryan P Matuszak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01D; B01D3/00; B01D3/14; C; C07; C07C; C07C7/00; C07C7/148; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00247; B01J2208/00539; Y; Y10; Y10S; Y10S203/00; Y10S203/06
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) | 1949-07-08 | 1950-01-07 | 1950-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-07-08 | 1954-01-07 | 1954-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-07-08 | 1958-01-07 | 1958-07-09 | $7700.00 | Window Closed / Lapsed |