US3655618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinyl halide thioether polymers
Assignee: Hooker Chemical Corp
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Filing: 1970-04-09
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Granted: 1972-04-11
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Expires: 1990-04-09
Abstract
Abstract POLYVINYL HALIDE THIOETHERS HAVING ARYL GROUPS SUBSTITUTED ON SULFUR AND WHEREIN THE POLYMERS ARE OF FROM 20,000 TO 100,000 NUMBER AVERAGE MOLECULAR WEIGHT ARE PREPARED BY THE DISPLACEMENT OF HALOGEN IN POLYVINYL HALIDE WITH AN ARYL MERCAPTIDE IN A POLAR SOLVENT AT ELEVATED TEMPERATURE IN THE PRESENCE OF SUBSTANTIALLY EQUIVALENT AMOUNT OF AN ALKALI METAL ALKYLATE. THE POLYMER IS CHARCTERIZED BY HAVING SUBSTANTIALLY GREATER THERMOSTABILITY AS COMPARED TO THE UNMODIFIED POLYVINYL HALIDE POLYMER, GOOD CURABILITY WITH FORMALDEHYDE IN THE MANNER OF A PHENOLIC AND GREATER RECEPTIVITY TO DYES AS COMPARED TO THE UNREACTED POLYVINYL HALIDE, FOR EXAMPLE.
Inventors
- 👤 Edward D Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:28
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/34
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |