US2581927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorination of butadiene polymers and copolymers
Assignee: Bridgestone Firestone Inc
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Filing: 1949-04-14
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Granted: 1952-01-08
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Expires: 1969-04-14
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Briant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:15
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/12; C08C19/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
PROCESS WHICH COMPRISES INJECTING CHLORINE INTO A SOLUTION OF AN ELASTOMER IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF (A) MIXTURES OF CARBON TETRACHLORIDE WITH ETHYLENE DICHLORIDE, (B) MIXTURES OF CARBON TETRACHLORIDE WITH 1,1,2,2TETRACHLOROETHANE AND (C) MIXTURES OF CARBON TETRACHLOROETHANE WITH ETHYLENE DICHLORIDE AND 1,1,2,2TETRACHLOROETHANE, SAID SOLVENT CONTAINING AT LEAST 80% OF CARBON TETRACHLORIDE AND NOT MORE THAN THE MAXIMUM PERCENTAGES OF CARBON TETRACHLORIDE AND OF ELASTOMER SET OUT IN TABLE A OPPOSITE THE VISCOSITY RANGE OF THE ELASTOMER, SAID ELASTOMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF BUTADIENE AND COPOLYMERS THEREOF WITH OTHER UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH CONTAINING AT LEAST 75% OF BUTADIENE COPOLYMERIZED THEREIN.
Claim 2
Dependent Claim
109 words
PROCESS WHICH COMPRISES INJECTING CHLORINE INTO A SOLUTION OF AN ELASTOMER IN A SOLVENT SELECTED FROM THE GROUP CONSISTING OF (A) MIXTURES OF CARBON TETRACHLORIDE WITH ETHYLENE DICHLORIDE, (B) MIXTURES OF CARBON TETRACHLORIDE WITH 1,1,2,2TETRACHLOROETHANE AND (C) MIXTURES OF CARBON TETRACHLOROETHANE WITH ETHYLENE DICHLORIDE AND 1,1,2,2TETRACHLOROETHANE, SAID SOLVENT CONTAINING AT LEAST 80% OF CARBON TETRACHLORIDE AND NOT MORE THAN THE MAXIMUM PERCENTAGES OF CARBON TETRACHLORIDE AND OF ELASTOMER SET OUT IN TABLE A OPPOSITE THE VISCOSITY RANGE OF THE ELASTOMER, SAID ELASTOMER BEING SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF BUTADIENE AND COPOLYMERS THEREOF WITH OTHER UNSATURATED COMPOUNDS COPOLYMERIZABLE THEREWITH CONTAINING AT LEAST 75% OF BUTADIENE COPOLYMERIZED THEREIN.
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) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |