US3009207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the formation of composite films
Assignee: Dow Chemical Co
•
Filing: 1957-03-21
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Granted: 1961-11-21
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Expires: 1977-03-21
Abstract
No abstract record available.
Inventors
- 👤 Floyd E Romesberg
- 👤 Robert M Karlinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/249979; Y10T428/249981; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
A PROCESS FOR PREPARING COMPOSITE FILMS COMPRISING AS SEQUENTIAL STEPS THE CONTINUOUS LOCALIZED COAGULATION OF A LATEX PREPARED BY THE EMULSION POLYMERIZATION OF FROM 92 TO 99 PERCENT VINYLIDENE CHLORIDE AND CORRESPONDINGLY FROM 8 TO 1 PERCENT BY WEIGHT OF ACRYLONITRILE TO FORM A CONTINUOUS COHERENT COAGULUM, WASHING AND DRYING SAID COAGULUM INTO A MICROPOROUS FILM HAVING FROM 40 TO 75 PERCENT POROSITY, DEPOSITING ON SAID MICROPOROUS FILM A FILM FORMING DISPERSION COMPOSED ESSENTIALLY OF (1) AS THE CONTINUOUS PHASE OF A NON-SOLVENT FOR THE POLYMER OF SAID LATEX AND (2) AS THE DISPERSED PHASE A THER-
Claim 2
Dependent Claim
97 words
A PROCESS FOR PREPARING COMPOSITE FILMS COMPRISING AS SEQUENTIAL STEPS THE CONTINUOUS LOCALIZED COAGULATION OF A LATEX PREPARED BY THE EMULSION POLYMERIZATION OF FROM 92 TO 99 PERCENT VINYLIDENE CHLORIDE AND CORRESPONDINGLY FROM 8 TO 1 PERCENT BY WEIGHT OF ACRYLONITRILE TO FORM A CONTINUOUS COHERENT COAGULUM, WASHING AND DRYING SAID COAGULUM INTO A MICROPOROUS FILM HAVING FROM 40 TO 75 PERCENT POROSITY, DEPOSITING ON SAID MICROPOROUS FILM A FILM FORMING DISPERSION COMPOSED ESSENTIALLY OF (1) AS THE CONTINUOUS PHASE OF A NON-SOLVENT FOR THE POLYMER OF SAID LATEX AND (2) AS THE DISPERSED PHASE A THER-
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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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |