Patent US3773853A successfully refreshed from Google Patents.
US3773853A
Expired / Lapsed
US
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Oligomerization of mono-olefins
Assignee: Universal Oil Products Co
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Filing: 1972-02-07
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Granted: 1973-11-20
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Expires: 1992-02-07
Abstract
Abstract OLEFINIC COMPOUNDS, AND PARTICULARLY MONO-OLEFINIC HYDROCARBONS, ARE OLIGOMERIZED BY TREATMENT WITH A CATALYST COMPRISING A TANTALUM-CONTAINING COMPOUND AT TEMPERATURES RANGING FROM ABOUT AMBIENT TO ABOUT 250*C. AND AT PRESSURES RANGING FROM ABOUT 1 TO ABOUT 100 ATMOSPHERES.
Inventors
- 👤 J Brennan
- 👤 G Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:07
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/10; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/20
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |