US3780125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of alpha-pinene-containing feed by zeolite
Assignee: Individual
•
Filing: 1972-12-18
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Granted: 1973-12-18
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Expires: 1992-12-18
Abstract
Abstract THERE IS DISCLOSED A PROCESS FOR PREPARING DIPENTENE BY EFFECTING THE ISOMERIZATION OF A PINENE CONTAINING FEED AT A TEMPERATURE OF FROM ABOUT 140*C. TO ABOUT 200*C. FOR MORE THAN ABOUT ONE-HALF HOUR IN THE PRESENCE OF LESS THAN ABOUT 10%, BASED ON THE WEIGHT OF THE SAID FEED, OF A ZEOLITE MOLECULAR SIEVE CATALYST OF EITHER THE 13X- OR 13YTYPE CONTAINING AN ALKALI METAL CATION, SUCH AS SODIUM, POTASSIUM, LITHIUM, RUBIDIUM, OR CESIUM, SAID CATALYST BEING ACTIVATED BY ADJUSTING THE PH OF AN AQUEOUS SLURRY TO A RANGE FROM ABOUT 5.0 TO ABOUT 10 PRIOR TO USE.
Inventors
- 👤 E Takacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; Y; Y10; Y10S; Y10S208/00; Y10S208/02
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |