US2769802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of divinyl sulfide and methods for their production
Assignee: Phillips Petroleum Co
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Filing: 1952-12-08
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Granted: 1956-11-06
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Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 James E Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
C; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR PRODUCING A COPOLYMER WHICH COMPRISES CONTACTING DIVINYL SULFIDE AND A COMONOMER SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE, CYCLOHEXENE AND HEXADECENE-1 WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE AND BORON TRIFLUORIDE, AT A TEMPERATURE OF -60 TO 0* C. FOR A PERIOD OF 0.5 TO 20 HOURS, THE MOL RATIO OF DIVINYL SULFIDE TO SAID COMONOMER BEING WITHIN THE RANGE OF 1:0.3 TO 1:50.
Claim 2
Dependent Claim
71 words
A PROCESS FOR PRODUCING A COPOLYMER WHICH COMPRISES CONTACTING DIVINYL SULFIDE AND A COMONOMER SELECTED FROM THE GROUP CONSISTING OF ISOBUTYLENE, CYCLOHEXENE AND HEXADECENE-1 WITH A CATALYST SELECTED FROM THE GROUP CONSISTING OF ALUMINUM CHLORIDE AND BORON TRIFLUORIDE, AT A TEMPERATURE OF -60 TO 0* C. FOR A PERIOD OF 0.5 TO 20 HOURS, THE MOL RATIO OF DIVINYL SULFIDE TO SAID COMONOMER BEING WITHIN THE RANGE OF 1:0.3 TO 1:50.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |