Patent US3137682A successfully refreshed from Google Patents.
US3137682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of methyl-tert-butylstyrenes
Assignee: Beazer East Inc
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Filing: 1959-03-10
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Granted: 1964-06-16
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ben B Corson
- 👤 William J Heintzelman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:01
CPC Classifications
C; C08; C08F; C08F112/00; C08F112/02; C08F112/04; C08F112/06; C08F112/12; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F212/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE HOMOPOLYMER OF A SUBSTITUTED ORTHOVINYLTOLUENE WHEREIN THE ONLY SUBSTITUTION BEING THAT A HYDROGEN ATOM OF THE PHENYL GROUP AT LEAST TWO POSITIONS REMOVED FROM BOTH THE METHYL AND VINYL GROUPS IS REPLACED BY A TERTIARY BUTYL GROUP SAID HOMOPOLYMER HAVING A HEAT DISTORTION
Claim 2
Dependent Claim
44 words
THE HOMOPOLYMER OF A SUBSTITUTED ORTHOVINYLTOLUENE WHEREIN THE ONLY SUBSTITUTION BEING THAT A HYDROGEN ATOM OF THE PHENYL GROUP AT LEAST TWO POSITIONS REMOVED FROM BOTH THE METHYL AND VINYL GROUPS IS REPLACED BY A TERTIARY BUTYL GROUP SAID HOMOPOLYMER HAVING A HEAT DISTORTION
References Cited (Backward Citations)
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Cited
US2723261A
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US2911391A
Cited
US2776921A
Cited
US2802812A
Cited
US2987508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |