US2957036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing diisopropenyldiphenyl and homologs thereof
Assignee: White Laboratories Inc
•
Filing: 1957-07-11
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Granted: 1960-10-18
•
Expires: 1977-07-11
Abstract
No abstract record available.
Inventors
- 👤 Richard L Markus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C1/24; C07C15/00; C07C15/40; C07C15/50; C07C45/00; C07C45/45; C07C45/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE NON-CATALYTIC DEHYDRATION PROCESS WHICH INCLUDES ADMIXING A COMPOUND HAVING THE FORMULA WHEREIN N IS AN INTEGER FROM 0-10, INCLUSIVE, AND, AN INERT HIGH-BOILING NON-PEROXIDE FORMING REFINED PETROLEUM HYDROCARBON SOLVENT IN A REACTION ZONE, HEATING THE ADMIXTURE TO DEHYDRATE THE STARTING COMPOUND, DISTILLING OFF A MAJOR PORTION OF THE SOLVENT-WATER OF DEHYDRATION FRACTION FROM SAID ADMIXTURE, SLOWLY ADDING PREHEATED ANHYDROUS ETHYLENE GLYCOL TO THE REACTION ZONE WHILE DISTILLING OFF THE BALANCE OF THE SOLVENT FRACTION, SLOWLY ADDING ADDITIONAL PREHEATED ANHYDROUS ETHYLENE GLYCOL TO THE REACTION ZONE WHILE DISTILLING OFF THE ETHYLENE GLYCOL FRACTION WHICH CONTAINS THE DESIRED PRODUCT HAVING THE FORMULA WHEREIN N IS THE SAME CARDINAL NUMBER AS ABOVE, COLLECTING THE DISTILLATE, AND RECOVERING THE DESIRED PRODUCT THEREFROM.
Claim 2
Dependent Claim
119 words
THE NON-CATALYTIC DEHYDRATION PROCESS WHICH INCLUDES ADMIXING A COMPOUND HAVING THE FORMULA WHEREIN N IS AN INTEGER FROM 0-10, INCLUSIVE, AND, AN INERT HIGH-BOILING NON-PEROXIDE FORMING REFINED PETROLEUM HYDROCARBON SOLVENT IN A REACTION ZONE, HEATING THE ADMIXTURE TO DEHYDRATE THE STARTING COMPOUND, DISTILLING OFF A MAJOR PORTION OF THE SOLVENT-WATER OF DEHYDRATION FRACTION FROM SAID ADMIXTURE, SLOWLY ADDING PREHEATED ANHYDROUS ETHYLENE GLYCOL TO THE REACTION ZONE WHILE DISTILLING OFF THE BALANCE OF THE SOLVENT FRACTION, SLOWLY ADDING ADDITIONAL PREHEATED ANHYDROUS ETHYLENE GLYCOL TO THE REACTION ZONE WHILE DISTILLING OFF THE ETHYLENE GLYCOL FRACTION WHICH CONTAINS THE DESIRED PRODUCT HAVING THE FORMULA WHEREIN N IS THE SAME CARDINAL NUMBER AS ABOVE, COLLECTING THE DISTILLATE, AND RECOVERING THE DESIRED PRODUCT THEREFROM.
References Cited (Backward Citations)
CA495419A
Cited
US2068010A
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US2474735A
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US2465486A
Cited
US2496207A
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US2634302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |