US3640974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modifying polymers
Assignee: Hercules LLC
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Filing: 1969-05-05
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Granted: 1972-02-08
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Expires: 1989-05-05
Abstract
Abstract VINYL CHLORIDE AND VINYLIDENE CHLORIDE POLYMERS CAN BE CROSS-LINKED OR OTHERWISE MODIFIED BY REACTION WITH A POLY (DIAZO) COMPOUND SELECTED FROM THE GROUP OF R-(O-CO-CN2-R'')X AND A-(CN2-R'')X WHERE X IS AN INTEGER GREATER THAN 1, R IS AN ORGANIC RADICAL INERT TO MODIFICATION REACTIONS, A IS AN AROMATIC RADICAL INERT TO MODIFICATION REACTIONS, AND R'' IS A HYDROGEN, ARYL OR -COOZ RADICAL WHERE Z IS AN ALKYL OR ARYL RADICAL. THE REACTION BETWEEN THE POLY (DIAZO) COMPOUND AND POLYMER CAN BE INITIATED EITHER BY HEATING OR BY EXPOSING TO ULTRAVIOLET RADIATION.
Inventors
- 👤 David S Breslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:21
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |