US2958673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymer and method of making
Assignee: Wyeth Holdings LLC
•
Filing: 1957-07-18
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Granted: 1960-11-01
•
Expires: 1977-07-18
Abstract
No abstract record available.
Inventors
- 👤 Jen Yun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:51
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A PROCESS OF MAKING A GRAFT COPOLYMER WHICH COMPRISES CHEMICALLY COMBINING, BY COPOLYMERIZATION WITH THE AID OF A FREE-RADICAL POLYMERIZATION CATALYST, (C) A NUCLEARLY SUBSTITUTED METHYLSTYRENE AND A REACTIVE, THERMOPLASTIC COPOLYMER, OBTAINED BY POLYMERIZING WITH THE AID OF A FREE-RADICAL POLYMERIZATION CATALYST, A POLYMERIZABLE MIXTURE OF MONOMER CONSISTING OF (A) BUTYL ACRYLATE AND (B) ALLYL ACRYLATE, THE COMPOUND OF (B) CONSTITUTING FROM 0.5 MOLE PERCENT TO NOT MORE THAN 30 MOLE PERCENT OF THE TOTAL MOLAR AMOUNT OF (A) AND (B) IN THE AFORESAID POLYMERIZABLE MIXTURE, THE NUCLEARLY SUBSTITUTED METHYLSTYRENE OF (C) BEING POLYMERIZABLE REACTIVE WITH THE AFORESAID THERMOPLASTIC COPOLYMER, AND THE MOLAR PROPORTIONS OF THE COMPOUND OF (C) TO THE TOTAL OF THE COMPOUNDS OF (A) PLUS (B) BEING FROM ABOUT 50:99.5 OF THE COMPOUND OF (C) TO 0.5.50 OF THE TOTAL OF THE COMPOUNDS OF (A) PLUS (B).
Claim 2
Dependent Claim
140 words
A PROCESS OF MAKING A GRAFT COPOLYMER WHICH COMPRISES CHEMICALLY COMBINING, BY COPOLYMERIZATION WITH THE AID OF A FREE-RADICAL POLYMERIZATION CATALYST, (C) A NUCLEARLY SUBSTITUTED METHYLSTYRENE AND A REACTIVE, THERMOPLASTIC COPOLYMER, OBTAINED BY POLYMERIZING WITH THE AID OF A FREE-RADICAL POLYMERIZATION CATALYST, A POLYMERIZABLE MIXTURE OF MONOMER CONSISTING OF (A) BUTYL ACRYLATE AND (B) ALLYL ACRYLATE, THE COMPOUND OF (B) CONSTITUTING FROM 0.5 MOLE PERCENT TO NOT MORE THAN 30 MOLE PERCENT OF THE TOTAL MOLAR AMOUNT OF (A) AND (B) IN THE AFORESAID POLYMERIZABLE MIXTURE, THE NUCLEARLY SUBSTITUTED METHYLSTYRENE OF (C) BEING POLYMERIZABLE REACTIVE WITH THE AFORESAID THERMOPLASTIC COPOLYMER, AND THE MOLAR PROPORTIONS OF THE COMPOUND OF (C) TO THE TOTAL OF THE COMPOUNDS OF (A) PLUS (B) BEING FROM ABOUT 50:99.5 OF THE COMPOUND OF (C) TO 0.5.50 OF THE TOTAL OF THE COMPOUNDS OF (A) PLUS (B).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |