US2879261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorosulfonated hydrocarbon copolymers
Assignee: EIDP Inc
•
Filing: 1955-08-18
•
Granted: 1959-03-24
•
Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Paul R Johnson
- 👤 Malcolm A Smook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:18
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34; C08F8/38; C08F2800/00; C08F2800/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
CURABLE ELASTOMERIC CHLOROSULFONATED COPOLYMERS OF AT LEAST TWO MONOOLEFINS, EACH BEING TERMINALLY UNSATURED AND CONTAINING NOT MORE THAN 6 CARBON ATOMS, AT LEAST ONE CONTAINING NOT MORE THAN 3 CAARBON ATOMS AND BEING PRESENT TO THE EXTENT OF AT LEAST 40 MOL PERCENT, EACH MONOOLEFIN BEING PRESENT AS A COMPONENT OF THE POLYMER TO AN EXTENT NOT GREATER THAN 60 MOL PERCENT SAID COPOLYMERS PRIOR TO CHLOROSULFONATION BEING NORMALLY SOLID AND OF HIGH MOLECULAR WEIGHT, AND IN THE CHLOROSULFONATED STATE CONTAINING FROM 5% TO ABOUT 35% OF CHLORINE AND FROM 0.5% TO ABOUT 3.0% OF SULFUR, SAID COPOLYMERS HAVING BEEN PREPARED BY POLYMERIZATION IN THE PRESENCE OF A COORDINATION POLYMERIZATION CATALYST PREPARED BY THE REACTION OF A LITHIUM ALUMINUM ALKYL WITH TITANIUM TETRACHLORIDE IN A HYDROCARBON SOLVENT.
Claim 2
Dependent Claim
127 words
CURABLE ELASTOMERIC CHLOROSULFONATED COPOLYMERS OF AT LEAST TWO MONOOLEFINS, EACH BEING TERMINALLY UNSATURED AND CONTAINING NOT MORE THAN 6 CARBON ATOMS, AT LEAST ONE CONTAINING NOT MORE THAN 3 CAARBON ATOMS AND BEING PRESENT TO THE EXTENT OF AT LEAST 40 MOL PERCENT, EACH MONOOLEFIN BEING PRESENT AS A COMPONENT OF THE POLYMER TO AN EXTENT NOT GREATER THAN 60 MOL PERCENT SAID COPOLYMERS PRIOR TO CHLOROSULFONATION BEING NORMALLY SOLID AND OF HIGH MOLECULAR WEIGHT, AND IN THE CHLOROSULFONATED STATE CONTAINING FROM 5% TO ABOUT 35% OF CHLORINE AND FROM 0.5% TO ABOUT 3.0% OF SULFUR, SAID COPOLYMERS HAVING BEEN PREPARED BY POLYMERIZATION IN THE PRESENCE OF A COORDINATION POLYMERIZATION CATALYST PREPARED BY THE REACTION OF A LITHIUM ALUMINUM ALKYL WITH TITANIUM TETRACHLORIDE IN A HYDROCARBON SOLVENT.
References Cited (Backward Citations)
US2212786A
Cited
US2726231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |