US3707585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension polymerization of vinyl monomers
Assignee: Toray Industries Inc
•
Filing: 1970-05-06
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Granted: 1972-12-26
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Expires: 1990-05-06
Abstract
Abstract A PROCESS FOR THE SUSPENSION POLYMERIZATION OF VINYL MONOMERS IN AN AQUEOUS MEDIUM USING AS A SUSPENDING AID A COPOLYMER OF AN ACRYLIC ACID ESTER WITH 70-90% ACRYLAMIDE, WHICH PROCESS PROVIDES HIGH SUSPENSION STABILITY, GOOD CONTROL OF PARTICLE SIZE OF THE RESULTANT POLYMER AND A RESULTANT POLYMER HAVING AN EXCELLENT TRANSPARENCY.
Inventors
- 👤 Takehiko Okamoto
- 👤 Masakazu Inoue
- 👤 Akihiko Kishimoto
- 👤 Tadahiro Sueyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/18; C08F2/20; Y; Y10; Y10S; Y10S526/00; Y10S526/91
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |