Patent US3825625A successfully refreshed from Google Patents.
US3825625A
Expired / Lapsed
US
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Process for producing high impact resistance resins
Assignee: Daicel Corp
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Filing: 1971-12-27
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Granted: 1974-07-23
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Expires: 1991-12-27
Abstract
Abstract PEARL-LIKE SPHERICAL TTHERMOPLASTIC RESIN BEADS HAVING A HIGH IMPACT RESISTANCE AND OF A CONTROLLED RELATIVELY SMALL PARTICLE SIZE ARE MADE BY SUBJECTING A MIXTURE OR A SOLUTION OF A RUBBER ELASTOMER IN AN AROMATIC MONOAKYENYL MONOMER OR A MIXTURE OF AN AROMATIC MONOALKENYL MONOMER AND A COPOLYMERIZABLE MONOVINYL MONOMER TO A BULK-SUSPENSION TWO STAGE POLYMERIZATION PROCESS. A PREDETERMINED AMOUNT OF A METALLIC SOAP OR AN ALKYLENE BISFATT ACID AMIDE IS ADDED TO THE MIXTURE OR SOLUTION BEFORE THE START OF THE BULK POLYMERIZATION IN AN AMOUNT WITHIN THE RANGE OF 0.001 TO 0.5% BY WEIGHT.
Inventors
- 👤 T Kudo
- 👤 S Ikeda
- 👤 M Kotani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:37
CPC Classifications
C; C08; C08F; C08F279/00; C08F279/02; C08F291/00; C08F291/02
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |