US3240742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapidly crystallizable polymeric blend of vinylidene chloride copolymers
Assignee: Dow Chemical Co
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Filing: 1962-10-03
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Granted: 1966-03-15
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Expires: 1982-10-03
Abstract
No abstract record available.
Inventors
- 👤 Harold G Hahn
- 👤 Norman A Lefevre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/093; C08J7/00; C08J7/04; C08J7/0427; C08J7/048; C08J7/052; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; C09D5/00; C09D5/18; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/08; C08J2427/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR PREPARING A COMPOSITION CAPABLE OF PROVIDING RAPIDLY CRYSTALLIZABLE SELF-SUPPORTING FILMS AND COATINGS COMPRISING: (I) DISSOLVING A COPOLYMER OF (A) FROM ABOUT 90 TO 91 WEIGHT PERCENT VINYLIDENE CHLORIDE AND (B) COMPLEMENTARILY FROM ABOUT 10 TO 9 WEIGHT PERCENT ACRYLONITRILE IN AN ORGANIC SOLVENT THEREFOR TO FORM A SOLUTION CONTAINING AT LEAST ABOUT 20 WEIGHT PERCENT OF SAID COPOLYMER; AND (II) ADDING TO SAID SOLUTION A MISCIBLE ORGANIC NONSOLVENT FOR SAID COPOLYMER IN AMOUNTS SUFFICIENT TO PROVIDE FROM BETWEEN ABOUT 0.003 TO ABOUT 6 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID COPOLYMER, OF A SOLID VINYLIDENE CHLORIDE POLYMER HAVING A VINYLIDENE CHLORIDE CONTENT OF AT LEAST ABOUT 95 WEIGHT PERCENT.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PREPARING A COMPOSITION CAPABLE OF PROVIDING RAPIDLY CRYSTALLIZABLE SELF-SUPPORTING FILMS AND COATINGS COMPRISING: (I) DISSOLVING A COPOLYMER OF (A) FROM ABOUT 90 TO 91 WEIGHT PERCENT VINYLIDENE CHLORIDE AND (B) COMPLEMENTARILY FROM ABOUT 10 TO 9 WEIGHT PERCENT ACRYLONITRILE IN AN ORGANIC SOLVENT THEREFOR TO FORM A SOLUTION CONTAINING AT LEAST ABOUT 20 WEIGHT PERCENT OF SAID COPOLYMER; AND (II) ADDING TO SAID SOLUTION A MISCIBLE ORGANIC NONSOLVENT FOR SAID COPOLYMER IN AMOUNTS SUFFICIENT TO PROVIDE FROM BETWEEN ABOUT 0.003 TO ABOUT 6 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID COPOLYMER, OF A SOLID VINYLIDENE CHLORIDE POLYMER HAVING A VINYLIDENE CHLORIDE CONTENT OF AT LEAST ABOUT 95 WEIGHT PERCENT.
References Cited (Backward Citations)
US3108017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |