Patent US3663453A successfully refreshed from Google Patents.
US3663453A
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US
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Skeletal isomerization of olefins over halogen-containing zirconia catalyst
Assignee: Phillips Petroleum Co
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Filing: 1970-04-20
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Granted: 1972-05-16
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Expires: 1990-04-20
Abstract
Abstract A CATALYST SUITABLE FOR THE SKELETAL ISOMERIZATION OF OLEFIN HYDROCARBONS COMPRISES ZIRCONIA PROMOTED WITH AT LEAST ONE COMPOUND WHICH IS A HALOGEN ACID OR AN AMMONIA HALIDE SALT WHICH HAS BEEN ACTIVATED BY CALCINATION AT A TEMPERATURE OF FROM ABOUT 500* TO ABOUT 1200*F.
Inventors
- 👤 John W Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:18
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2778; C07C5/2786; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |