Patent US3558537A successfully refreshed from Google Patents.
US3558537A
Expired / Lapsed
US
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Imparting antifogging properties to polyvinyl chloride resins and compositions therefor
Assignee: Argus Chemical Corp
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Filing: 1968-01-02
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Granted: 1971-01-26
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Expires: 1988-01-02
Abstract
Abstract A POLYVINYL CHLORIDE RESIN ANTIFOGGING COMPOSITION IS PROVIDED CAPABLE OF IMPROVING THE RESISTANCE OF THE RESIN TO FOGGING, COMPRISING A PARTIAL ESTER OF POLYGLYCEROL WITH AN UNSATURATED MONOCARBOXYLIC ALIPHATIC ACID HAVING FROM ABOUT EIGHT TO ABOUT TWENTY-FOUR CARBON ATOMS. THE POLYGLYCEROL PARTIAL ESTER RETAINS AT LEAST 25% OF ITS FREE HYDROXYL GROUPS. OTHERE ADDITIVES CAN BE INCORPORATED AS WELL, SUCH AS A POLYVINYL CHLORIDE RESIN EPOXY PLASTICIZER, AND OTHER HEAT STABILIZERS TO IMPROVE RESISTANCE OF THE RESIN TO HEAT DETERIORATION. POLYVINYL CHLORIDE RESIN COMPOSITIONS ARE ALSO PROFICED, COMPRISING SUCH POLYGLYCEROL PARTIAL ESTER ANTIFOGGING AGENTS.
Inventors
- 👤 Arthur C Hecker
- 👤 Stuart Donald Brilliant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:42
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |