US2946095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing porous films of vinyl chloride polymers
Assignee: Monsanto Chemicals Ltd
•
Filing: 1957-04-15
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Granted: 1960-07-26
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Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Ludwig A Beer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:21
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN A PROCESS FOR PREPARING A FILM OF A PLASTICIZED VINYL CHLORIDE POLYMER IN WHICH A DISPERSION OF A VINYL CHLORIDE POLYMER IN A PLASTICIZED THEREFOR IS CAST INTO A THIN FILM AND FUSED BY HEATING TO A TEMPERATURE OF AT LEAST 150*C. AT ATMOSPHEREIC PRESSURE, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE DISPERSION OF THE VINYL CHLORIDE POLYMER A WATER-RESIN SOLUTION CONTAINING FROM ABOUT 20 WEIGHT PERCENT TO ABOUT 65 WEIGHT PERCENT WATER AND THE BALANCE A RESIN FROM THE GROUP CONSISTING OF AN AMINOPLAST RESIN, A PHENOPLAST RESIN AND MIXTURES THEREOF, THE QUANTITY OF THE WATER-RESIN SOLUTION INCLUDED IN THE DISPERSION OF THE VINYL CHLORIDE POLYMER BEING SUFFICIENT TO PROVIDE 2-20 PARTS OF WATER PER 100 PARTS OF COMBINED VINYL CHLORIDE POLYMER AND PLASTICIZER.
Claim 2
Dependent Claim
126 words
IN A PROCESS FOR PREPARING A FILM OF A PLASTICIZED VINYL CHLORIDE POLYMER IN WHICH A DISPERSION OF A VINYL CHLORIDE POLYMER IN A PLASTICIZED THEREFOR IS CAST INTO A THIN FILM AND FUSED BY HEATING TO A TEMPERATURE OF AT LEAST 150*C. AT ATMOSPHEREIC PRESSURE, THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE DISPERSION OF THE VINYL CHLORIDE POLYMER A WATER-RESIN SOLUTION CONTAINING FROM ABOUT 20 WEIGHT PERCENT TO ABOUT 65 WEIGHT PERCENT WATER AND THE BALANCE A RESIN FROM THE GROUP CONSISTING OF AN AMINOPLAST RESIN, A PHENOPLAST RESIN AND MIXTURES THEREOF, THE QUANTITY OF THE WATER-RESIN SOLUTION INCLUDED IN THE DISPERSION OF THE VINYL CHLORIDE POLYMER BEING SUFFICIENT TO PROVIDE 2-20 PARTS OF WATER PER 100 PARTS OF COMBINED VINYL CHLORIDE POLYMER AND PLASTICIZER.
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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) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |