Patent US3065212A successfully refreshed from Google Patents.
US3065212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of acrylonitrile
Assignee: EIDP Inc
•
Filing: 1960-11-17
•
Granted: 1962-11-20
•
Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 George N Milford
- 👤 William K Wilkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:34
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/08; C08F2/00; C08F2/12; C08F2/16; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR PREPARING STAIN-RESISTANT POLYMERS BY POLYMERIZING A MONOMER COMPOSITION CONTAINING FROM ABOUT 96% TO 100% ACRYLONITRILE AND UP TO 4% OF A COPOLYMERIZABLE NEUTRAL ETHYLENICALLY UNSATURATED MONOMER, WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 10% TO ABOUT 40% BY WEIGHT OF SAID MONOMERS, ADJUSTING THE PH OF SAID SOLUTION TO THE RANGE FROM ABOUT 2 TO 5, HEATING SAID SOLUTION TO A TEMPERATURE FROM ABOUT 20*C. TO 70*C., AND THEREAFTER CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF CATALYZING AMOUNTS OF A PEROXY CATALYST SELECTED FROM THE GROUP CONSISTING OF HYDROGEN PEROXIDE, ALKYL AND ARYL HYDROPEROXIDES, ACETYL AND TRIACETONE PEROXIDES, AND ALKALI METAL PERBORATES AND PERCARBONATES, AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF 1-THIOGLYCEROL AND 1-THIOSORBITOL.
Claim 2
Dependent Claim
122 words
A PROCESS FOR PREPARING STAIN-RESISTANT POLYMERS BY POLYMERIZING A MONOMER COMPOSITION CONTAINING FROM ABOUT 96% TO 100% ACRYLONITRILE AND UP TO 4% OF A COPOLYMERIZABLE NEUTRAL ETHYLENICALLY UNSATURATED MONOMER, WHICH COMPRISES PREPARING AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 10% TO ABOUT 40% BY WEIGHT OF SAID MONOMERS, ADJUSTING THE PH OF SAID SOLUTION TO THE RANGE FROM ABOUT 2 TO 5, HEATING SAID SOLUTION TO A TEMPERATURE FROM ABOUT 20*C. TO 70*C., AND THEREAFTER CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF CATALYZING AMOUNTS OF A PEROXY CATALYST SELECTED FROM THE GROUP CONSISTING OF HYDROGEN PEROXIDE, ALKYL AND ARYL HYDROPEROXIDES, ACETYL AND TRIACETONE PEROXIDES, AND ALKALI METAL PERBORATES AND PERCARBONATES, AND AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF 1-THIOGLYCEROL AND 1-THIOSORBITOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |