Patent US3062777A successfully refreshed from Google Patents.
US3062777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers of styrene on butadiene rubbers and method for making same
Assignee: Union Carbide Corp
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Filing: 1953-04-14
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Granted: 1962-11-06
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Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Ivey Allen
- 👤 Kenneth T Garty
- 👤 John A Stenstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:22
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A RUBBERY STYRENE-GRAFTED BUTADIENE-STYRENE COPOLYMER BEING THE POLYMERIZATION REACTION PRODUCT OF A REACTION CHARGE OF STYRENE MONOMER AND A RUBBERY BUTADIENE-STYRENE COPOLYMER CONTAINING BETWEEN 3 AND 50% BY WEIGHT OF BOUND STYRENE, SAID REACTION BEING CONTINUED TO A STAGE WHERE THE INITIAL WEIGHT OF THE SAID BUTADIENE-STYRENE COPOLYMER CONSTITUTES FROM 20 TO 60 PERCENT BY WEIGHT OF THE REACTION PRODUCT SOLIDS AND IN WHICH FROM 3 TO 100 PARTS BY WEIGHT OF STYRENE HAVE BEEN REACTED ON 100 PARTS BY WEIGHT OF SAID BUTADIENE-STYRENE COPOLYMER, SAID STYRENE-GRAFTED BUTADIENE-STYRENE BEING CHARACTERIZED BY ITS INOSOLUBILITY IN BENZENE, CARBON TETRACHLORIDE, CHLOROFORM, DIMETHYL FORMAMIDE, CARBON DISULFIDE AND STYRENE.
Claim 2
Dependent Claim
104 words
A RUBBERY STYRENE-GRAFTED BUTADIENE-STYRENE COPOLYMER BEING THE POLYMERIZATION REACTION PRODUCT OF A REACTION CHARGE OF STYRENE MONOMER AND A RUBBERY BUTADIENE-STYRENE COPOLYMER CONTAINING BETWEEN 3 AND 50% BY WEIGHT OF BOUND STYRENE, SAID REACTION BEING CONTINUED TO A STAGE WHERE THE INITIAL WEIGHT OF THE SAID BUTADIENE-STYRENE COPOLYMER CONSTITUTES FROM 20 TO 60 PERCENT BY WEIGHT OF THE REACTION PRODUCT SOLIDS AND IN WHICH FROM 3 TO 100 PARTS BY WEIGHT OF STYRENE HAVE BEEN REACTED ON 100 PARTS BY WEIGHT OF SAID BUTADIENE-STYRENE COPOLYMER, SAID STYRENE-GRAFTED BUTADIENE-STYRENE BEING CHARACTERIZED BY ITS INOSOLUBILITY IN BENZENE, CARBON TETRACHLORIDE, CHLOROFORM, DIMETHYL FORMAMIDE, CARBON DISULFIDE AND STYRENE.
References Cited (Backward Citations)
US2382498A
Cited
US2356965A
Cited
US2609353A
Cited
GB649166A
Cited
GB679562A
Cited
FR999594A
Cited
US2606163A
Cited
US2694692A
Cited
US2668806A
Cited
US2646418A
Cited
US2745818A
Cited
US2683127A
Cited
US2755270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |