US3300545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blends of polystyrene and a graft copolymer of a styrene-methyl methacrylate type mixture on a rubbery polymer of a conjugated 1, 3-diene
Assignee: Monsanto Co
•
Filing: 1962-08-13
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Granted: 1967-01-24
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Baer Massimo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:45
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/06; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/06; C08L51/00; C08L51/04; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN INTIMATE PHYSICAL ADMIXTURE OF POLYMERIC COMPONENTS CONSISTING OF (A) POLYSTYRENE AND (B) A GRAFT COPOLYMER PREPARED BY POLYMERIZING ABOUT 25-100 PARTS BY WEIGHT OF A MONOMER MIXTURE CONSISTING ESSENTIALLY OF 20-80% BY WEIGHT OF STYRENE AND, CORRESPONDINGLY, 80-20% BY WEIGHT OF METHYL METHACRYLATE IN AN AQUEOUS DISPERSION OF 100 PARTS BY WEIGHT OF RUBBER POLYMER HAVING A SECOND ORDER TRANSITION TEMPERATURE NOT HIGHER THAN ABOUT 0* CENTIGRADE, AS DETERMINED BY ASTM TEST D746-52T, SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, POLYISOPRENE, INTERPOLYMERS OF 50-95 WEIGHT PERCENT OF BUTADIENE AND 50-5 WEIGHT PERCENT OF STYRENE AND INTERPOLYMERS OF 50-95 WEIGHT PERCENT OF ISOPRENE AND 50-5 WEIGHT PERCENT OF STYRENE; SAID POLYSTYRENE AND GRAFT COPOLYMER BEING COMBINED IN SUCH PROPORTIONS THAT THE GRAFT COPOLYMER SUBSTRATE CONSTITUTES 5-40% BY WEIGHT OF THE ADMIXTURE.
Claim 2
Dependent Claim
131 words
AN INTIMATE PHYSICAL ADMIXTURE OF POLYMERIC COMPONENTS CONSISTING OF (A) POLYSTYRENE AND (B) A GRAFT COPOLYMER PREPARED BY POLYMERIZING ABOUT 25-100 PARTS BY WEIGHT OF A MONOMER MIXTURE CONSISTING ESSENTIALLY OF 20-80% BY WEIGHT OF STYRENE AND, CORRESPONDINGLY, 80-20% BY WEIGHT OF METHYL METHACRYLATE IN AN AQUEOUS DISPERSION OF 100 PARTS BY WEIGHT OF RUBBER POLYMER HAVING A SECOND ORDER TRANSITION TEMPERATURE NOT HIGHER THAN ABOUT 0* CENTIGRADE, AS DETERMINED BY ASTM TEST D746-52T, SELECTED FROM THE GROUP CONSISTING OF POLYBUTADIENE, POLYISOPRENE, INTERPOLYMERS OF 50-95 WEIGHT PERCENT OF BUTADIENE AND 50-5 WEIGHT PERCENT OF STYRENE AND INTERPOLYMERS OF 50-95 WEIGHT PERCENT OF ISOPRENE AND 50-5 WEIGHT PERCENT OF STYRENE; SAID POLYSTYRENE AND GRAFT COPOLYMER BEING COMBINED IN SUCH PROPORTIONS THAT THE GRAFT COPOLYMER SUBSTRATE CONSTITUTES 5-40% BY WEIGHT OF THE ADMIXTURE.
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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) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |