US2913426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of polymerizing styrene in a rubber using tertiary butyl perbenzoate and an azo catalyst
Assignee: Catalin Corp of America
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Filing: 1957-02-20
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Granted: 1959-11-17
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Expires: 1977-02-20
Abstract
No abstract record available.
Inventors
- 👤 Tsi T Li
- 👤 Robert W Raetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:13
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/08; C08F279/00; C08F279/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN BEAD SUSPENSION POLYMERIZATION OF A POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A RING SUBSTITUTED STYRENE IN THE PRESENCE OF A RUBBER WHICH IS A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF CONJUGATED DIENES AND POLYMERS OF ISOBUTYLENE IN AQUEOUS MEDIUM, THE METHOD WHICH COMPRISES THE STEP OF CARRYING OUT POLYMERIZATION IN THE PRESENCE OF CATALYTIC AMOUNTS OF A TWO CATALYST SYSTEM, ONE OF SAID CATALYSTS BEING AN AZO POLYMERIZATION CATALYST AND THE SECOND OF SAID CATALYSTS BEING TERTIARY PERBENZOATE.
Claim 2
Dependent Claim
86 words
IN BEAD SUSPENSION POLYMERIZATION OF A POLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE AND A RING SUBSTITUTED STYRENE IN THE PRESENCE OF A RUBBER WHICH IS A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYMERS OF CONJUGATED DIENES AND POLYMERS OF ISOBUTYLENE IN AQUEOUS MEDIUM, THE METHOD WHICH COMPRISES THE STEP OF CARRYING OUT POLYMERIZATION IN THE PRESENCE OF CATALYTIC AMOUNTS OF A TWO CATALYST SYSTEM, ONE OF SAID CATALYSTS BEING AN AZO POLYMERIZATION CATALYST AND THE SECOND OF SAID CATALYSTS BEING TERTIARY PERBENZOATE.
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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |