Patent US2522981A successfully refreshed from Google Patents.
US2522981A
Expired / Lapsed
US
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Copolymers of butadiene and nuclear-substituted poly-haloalpha-methylstyrene
Assignee: Purdue Research Foundation
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Filing: 1946-05-09
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Granted: 1950-09-19
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Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Gustave B Bachman
- 👤 Jr Guido H Stempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:04
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/14; C08F212/16; C08F212/18; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A VULCANIZABLE RUBBERY COPOLYMERIZATION PRODUCT OF A CONJUGATED DIOLEFINIC COMPOUND HAVING LESS THAN EIGHT CARBON ATOMS AND AN ALPHA-ALKYLARYLETHYLENE HAVING LESS THAN THREE CARBONS IN THE ALPHA-ALKYL GROUP, HAVING A PLURALITY OF NUCLEAR HALOGEN ATOMS AND HAVING THE POSITIONS ON THE BENZENE RING NEXT ADJACENT THE CARBON ATOM DIRECTLY ATTACHED TO THE OLEFINIC GROUP CONNECTED DIRECTLY TO A HYDROGEN, 45% TO 85% BY WEIGHT OF SAID POLYMER BEING FORMED FROM POLYMERIZABLE CONJUGATED DIOLEFINIC COMPOUNDS.
Claim 2
Dependent Claim
74 words
A VULCANIZABLE RUBBERY COPOLYMERIZATION PRODUCT OF A CONJUGATED DIOLEFINIC COMPOUND HAVING LESS THAN EIGHT CARBON ATOMS AND AN ALPHA-ALKYLARYLETHYLENE HAVING LESS THAN THREE CARBONS IN THE ALPHA-ALKYL GROUP, HAVING A PLURALITY OF NUCLEAR HALOGEN ATOMS AND HAVING THE POSITIONS ON THE BENZENE RING NEXT ADJACENT THE CARBON ATOM DIRECTLY ATTACHED TO THE OLEFINIC GROUP CONNECTED DIRECTLY TO A HYDROGEN, 45% TO 85% BY WEIGHT OF SAID POLYMER BEING FORMED FROM POLYMERIZABLE CONJUGATED DIOLEFINIC COMPOUNDS.
References Cited (Backward Citations)
US2384535A
Cited
US2439076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |