US3876591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arylene sulfide polymers
Assignee: Phillips Petroleum Co
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Filing: 1973-11-19
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Granted: 1975-04-08
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Expires: 1993-11-19
Abstract
Abstract A method of producing an arylene sulfide polymer of relatively high molecular weight employing (1) polyhalo-substituted aromatic compounds; (2) organic amides; and, (3) an alkali metal bisulfide in an amount within the range of from about 0.8 to about 1.5 gram-moles per gram-mole of polyhalosubstituted aromatic compound.
Inventors
- 👤 Robert W Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:51
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0259
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF PRODUCING A POLYMER WHICH COMPRISES: A. FORMING A COMPOSITION BY CONTACTING AT LEAST ONE POLYHALO-SUBSTITUTED AROMATIC COMPOUND WHEREIN THE HALOGEN ATOMS ARE ATTACHED TO AROMATIC RING CARBON ATOMS, AT LEAST ONE ORGANIC AMIDE AND AT LEAST ONE ALKALI METAL BISULFIDE, SAID BISULFIDE BEING EMPLOYED IN AN AMOUNT WITHIN THE RANGE OF FROM ABOUT 0.8 TO ABOUT 1.5 GRAMMOLES PER GRAM-MOLE OF POLYHALO-SUBSTITUTED AROMATIC COMPOUND; AND, B. MAINTAINING AT LEAST A PORTION OF SAID COMPOSITION AT POLYMERIZATION CONDITIONS TO PRODUCE SAID POLYMER.
Claim 2
Independent Claim
84 words
A METHOD OF PRODUCING A POLYMER WHICH COMPRISES: A. FORMING A COMPOSITION BY CONTACTING AT LEAST ONE POLYHALO-SUBSTITUTED AROMATIC COMPOUND WHEREIN THE HALOGEN ATOMS ARE ATTACHED TO AROMATIC RING CARBON ATOMS, AT LEAST ONE ORGANIC AMIDE AND AT LEAST ONE ALKALI METAL BISULFIDE, SAID BISULFIDE BEING EMPLOYED IN AN AMOUNT WITHIN THE RANGE OF FROM ABOUT 0.8 TO ABOUT 1.5 GRAMMOLES PER GRAM-MOLE OF POLYHALO-SUBSTITUTED AROMATIC COMPOUND; AND, B. MAINTAINING AT LEAST A PORTION OF SAID COMPOSITION AT POLYMERIZATION CONDITIONS TO PRODUCE SAID POLYMER.
References Cited (Backward Citations)
US3354129A
Cited
US3538166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |