Patent US2720509A successfully refreshed from Google Patents.
US2720509A
Expired / Lapsed
US
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Sulfur-containing resins from 4-vinyl-1-cyclohexene
Assignee: Phillips Petroleum Co
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Filing: 1952-09-08
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Granted: 1955-10-11
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Expires: 1972-09-08
Abstract
No abstract record available.
Inventors
- 👤 Asa C Dees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:15
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
THE PRODUCTION OF SULFUR-CONTAINING RESINOUS POLYMERS, RANGING FROM LIGHT YELLOW VISCOUS LIQUIDS TO A GLASSY SOLID HAVING A DEEP AMBER COLOR BY TRANSMITTED LIGHT, FROM HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE WHICH COMPRISES BRINGING TOGETHER IN A REACTION ZONE HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE, IN THE PRESENCE OF A LIQUID, ACID TYPE CATALYST, AT A TEMPERATURE CONTROLLED TO BE IN THE RANGE 0-300* F., FOR A PERIOD OF TIME SUFFICIENT TO ENSURE THOROUGH ADMIXTURE OF THE SAID HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE AND TO COMPLETE THE FORMATION THEREIN OF THE SAID POLYMERS AND THEN RECOVERING SAID RESINOUS POLYMERS FROM THE REACTION MASS THUS OBTAINED.
Claim 2
Dependent Claim
100 words
THE PRODUCTION OF SULFUR-CONTAINING RESINOUS POLYMERS, RANGING FROM LIGHT YELLOW VISCOUS LIQUIDS TO A GLASSY SOLID HAVING A DEEP AMBER COLOR BY TRANSMITTED LIGHT, FROM HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE WHICH COMPRISES BRINGING TOGETHER IN A REACTION ZONE HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE, IN THE PRESENCE OF A LIQUID, ACID TYPE CATALYST, AT A TEMPERATURE CONTROLLED TO BE IN THE RANGE 0-300* F., FOR A PERIOD OF TIME SUFFICIENT TO ENSURE THOROUGH ADMIXTURE OF THE SAID HYDROGEN SULFIDE AND 4-VINYL-1-CYCLOHEXENE AND TO COMPLETE THE FORMATION THEREIN OF THE SAID POLYMERS AND THEN RECOVERING SAID RESINOUS POLYMERS FROM THE REACTION MASS THUS OBTAINED.
References Cited (Backward Citations)
US2551813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |