Patent US3600455A successfully refreshed from Google Patents.
US3600455A
Expired / Lapsed
US
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Production of 4-methyl pentene-1
Assignee: Imperial Chemical Industries Ltd
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Filing: 1969-12-09
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Granted: 1971-08-17
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Expires: 1989-12-09
Abstract
Abstract A PROCESS FOR PRODUCING 4-METHYL PENTENE-1 WHICH COMPRISES DEHYDRATING 4-METHYL PENTAN-1-OL OR 4-METHYL PENTAN-2-OL BY PASSING IT OVER A DEHYDRATION CATALYST COMPRISING ALKALISED ALUMINA.
Inventors
- 👤 Fred Dean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02; B01J23/04; C; C07; C07C; C07C1/00; C07C1/20; C07C1/24; C07C2521/00; C07C2521/02; C07C2521/04
Claims Analysis
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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) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |