US3763124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of the alkali metal sulfide reactant to reduce impurities and its reaction with a polyhalo substituted aromatic compound
Assignee: Phillips Petroleum Co
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Filing: 1971-06-21
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Granted: 1973-10-02
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Expires: 1991-06-21
Abstract
Abstract AN IMPROVED METHOD OF PREPARING ARYLENE SULFIDE POLYMERS RESULTS FROM TREATMENT OF THE ALKALI METAL SULIFIDE REACTANTS PRIOR TO REACTION WITH POLYHALO-SUBSTITUTED AROMATIC COMPOUNDS. THE METHOD IS ONE WHICH COMPRISES THE STEPS OF: (1) CONTACTING AN ALKALI METAL SULFIDE REACTANT COMPRISING AN ALKALI METAL SULFIDE AND AN IMPURITY SELECTED FROM THE CLASS CONSISTING OF ALKALI METAL HYDROSULFIDE, ALKALI METAL THIOSULFATE, AND MIXTURES THEREOF, WITH AN ALKALI METAL HYDROXIDE; AND (2) SUBSEQUENTLY REACTING THE THUS CONTACTED ALKALI METAL SULFIDE REACTANT WITH A POLYHALO-SUBSTITUTED AROMATIC COMPOUND TO FORM AN IMPROVED ARYLENE SULFIDE POLYMER.
Inventors
- 👤 J Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0254
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |