US3829531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additive for impact modified thermoplastics
Assignee: Rohm and Haas Co
•
Filing: 1973-01-08
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Granted: 1974-08-13
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Expires: 1993-01-08
Abstract
Abstract THERMOPLASTIC ARTICLES HAVING GREATLY REDUCED SUSCEPTIBILITY TO HAZING ARE PREPARED FROM A SOLUTION OF A POLYURETHANE IMPACT MODIFIER IN AN A,B-UNSATURATED MONOMER COMPRISING METHYL METHACRYLTE, AND A HAZE MODIFIER COPOLYMER.
Inventors
- 👤 R Graff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08F; C08F290/00; C08F290/02; C08F290/06; C08F290/067; C08F290/068; C08F290/08; C08F290/14; C08F290/147; C08L; C08L75/00; C08L75/04
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |