US2606894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organic solvent-soluble vinylidene chloride-acrylonitrile interpolymers
Assignee: EIDP Inc
•
Filing: 1947-11-04
•
Granted: 1952-08-12
•
Expires: 1967-11-04
Abstract
No abstract record available.
Inventors
- 👤 Pitzl Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:43
CPC Classifications
C; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS FOR PREPARING AN ORGANIC SOLVENTSOLUBLE INTERPOLYMER OF VINYLIDENE CHLORIDE AND ACRYLONITRILE, WHICH CONSISTS IN DISPERSING 90 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE AND 10 PARTS BY WEIGHT OF ACRYLONITRILE IN AN AQUEOUS MEDIUM CONSISTING OF WATER, SULFATED METHYL OLEATE AS THE DISPERSING AGENT, AMMONIUM PERSULFATE AS CATALYST, AND META SODIUM BISULFITE AS ACTIVATOR, THE AMOUNT OF CATALYST AND THE AMOUNT OF ACTIVATOR BEING SO PROPORTIONED THAT THE POINT XY, WHERE X REPRESENTS THE PER CENT BY WEIGHT OF AMMONIUM PERSULFATE BASED ON THE WEIGHT OF VINYLIDENE CHLORDIE AND ACRYLONITRILE MONOMER USED, AND Y REPRESENTS THE PER CENT BY WEIGHT OF META SODIUM BISULFITE, FALLS WITHIN THE TRIANGLE ABC OF FIG.1 OF THE ACCOMPANYING DRAWING, AND MAINTAINING THE RESULTING DISPERSION AT A TEMPERATURE OF 33*-35* C. UNDER REFLUX, WHERE-
Claim 2
Dependent Claim
130 words
A PROCESS FOR PREPARING AN ORGANIC SOLVENTSOLUBLE INTERPOLYMER OF VINYLIDENE CHLORIDE AND ACRYLONITRILE, WHICH CONSISTS IN DISPERSING 90 PARTS BY WEIGHT OF VINYLIDENE CHLORIDE AND 10 PARTS BY WEIGHT OF ACRYLONITRILE IN AN AQUEOUS MEDIUM CONSISTING OF WATER, SULFATED METHYL OLEATE AS THE DISPERSING AGENT, AMMONIUM PERSULFATE AS CATALYST, AND META SODIUM BISULFITE AS ACTIVATOR, THE AMOUNT OF CATALYST AND THE AMOUNT OF ACTIVATOR BEING SO PROPORTIONED THAT THE POINT XY, WHERE X REPRESENTS THE PER CENT BY WEIGHT OF AMMONIUM PERSULFATE BASED ON THE WEIGHT OF VINYLIDENE CHLORDIE AND ACRYLONITRILE MONOMER USED, AND Y REPRESENTS THE PER CENT BY WEIGHT OF META SODIUM BISULFITE, FALLS WITHIN THE TRIANGLE ABC OF FIG.1 OF THE ACCOMPANYING DRAWING, AND MAINTAINING THE RESULTING DISPERSION AT A TEMPERATURE OF 33*-35* C. UNDER REFLUX, WHERE-
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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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |