US3595823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous emulsions of styrene-acrylonitrile-acrylic therpolymers
Assignee: Westvaco Corp
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Filing: 1969-07-18
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Granted: 1971-07-27
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Expires: 1989-07-18
Abstract
Abstract A TERPOLYMER COMPRISING A MAJOR AMOUNT OF STYRENE, AND MONOR AMOUNTS OF ACRYLONITRILE AND ANOTHER ACRYLIC MATERIAL, WHICH HAS UTILITY AS AN ORGANIC PIGMENT IN PAPER COATING COMPOSITIONS. A STABLE AQUEOUS EMULSION OF THE TERPOLYMER IS PREPARED WITHOUT THE NEED FOR CONVENTIONAL PROTECTIVE COLLOIDS BY USE OF BULKY EMULSIFIERS. THE AVERAGE PARTICLE SIZE OF THE TERPOLYMERS PRODUCED RANGES FROM ABOUT 0.1 TO ABOUT 0.2 MICRON.
Inventors
- 👤 Denis K Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:42
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/42
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |