US3706702A
Expired / Lapsed
US
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Linear aromatic copolythioethers
Assignee: General Electric Co
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Filing: 1970-03-02
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Granted: 1972-12-19
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Expires: 1990-03-02
Abstract
Abstract Heat resistant linear aromatic copolythioethers having recurring the structural units -S-R-S-R'' in which R and R'' originate from a dithiol and a polyhalogen. Preparing these copolythioethers by intermixing an aromatic dithiol and a bifunctional aromatic polyhalogen and an aromatic dithiol or a bifunctional aromatic polyhalogen different from the above. Reacting these compounds in an alkaline medium, without oxygen and in the presence of an inert polar aprotic solvent. Then recovering the copolythioether.
Inventors
- 👤 Josef Studinka
- 👤 Rudolf Gabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:56
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/301; C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0227; C08G75/0236; C08G75/024; C08G75/04; C08G75/12; C08G75/14; C08G75/20; C08G75/23; H01B3/307
Claims Analysis
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |