US3655825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic impact resistant modifiers for polyvinyl chloride
Assignee: Rohm and Haas Co
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Filing: 1969-03-24
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Granted: 1972-04-11
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Expires: 1989-03-24
Abstract
Abstract THIS INVENTION RELATES TO SOLID, THERMOPLASTIC, POLYMERIC PRODUCTS RESULTING FORM THE POLYMERIZATION OF LOWER ALKYL ESTERS OF ACRYLIC AND METHACRYLIC ACID. IT ALSO RELATES TO HIGH IMPACT-RESISTANT MATERIALS WHICH RESULT FROM BLENDS OF SUCH PRODUCTS WITH OTHER POLYMERIC MATERIALS, PARTICULARLY POLYMERS AND COPOLYMERS OF VINYL CHLORIDE. THE COPOLYMERS WHICH ARE USED IN SUCH BLENDS TYPICALLY COMPRISE AT LEAST 80% BY WEIGHT OF A POLYVINYL HALIDE WITH UP TO 20% BY WEIGHT OF ANOTHER MONOVINYLIDENE COMPOUND COPOLYMERIZABLE THEREWITH, SUCH AS VINYL ACETATE, METHYL METHACRYLATE, STYRENE, OR THE LIKE.
Inventors
- 👤 Louis C Souder
- 👤 Bjorn E Larsson
- 👤 Charles F Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:38
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L51/00; C08L51/003
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |