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US2959627A
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Purification of olefins
Assignee: Catalysts and Chemicals Europe
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Filing: 1958-10-13
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Granted: 1960-11-08
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Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Harold W Fleming
- 👤 William R Gutmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:28
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |