US3781384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of abs resins in the presence of unsaturated alpha-methylstyrene dimers
Assignee: Foster Grant Co Inc
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Filing: 1972-01-24
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Granted: 1973-12-25
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Expires: 1992-01-24
Abstract
Abstract SOLVENT RESISTANT POLYMERS HAVING IMPROVED SURFACE APPEARANCE, AND GOOD IMPACT AND TENSILE STRENGTHS ARE PREPARED BY MASS POLYMERIZING, UNTIL ABOUT 2 TO 15% OF THE MONOMERIC COMPONENTS ARE CONVERTED TO POLYMER, A MONOMERIC MIXTURE OF AT LEAST ONE MONOVINYL AROMATIC COMPOUND AND AT LEAST ONE UNSATURATED ORGANONITRILE COMPOUND, THE MONOMERIC MIXTURE HAVING DISSOLVED THEREIN AT LEAST ONE RUBBERY POLYMER, ADDING UNSATURATED ALPHAMETHYLSTYRENE DIMERS TO THE POLYMERIZATION MIXTURE AND COMPLETING THE POLYMERIZATION.
Inventors
- 👤 A Finestone
- 👤 J Milgrom
- 👤 S Slovenkai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:26
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F279/04; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L25/12; C08L51/00; C08L51/04; C08L55/00; C08L55/02; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 0
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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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |