Patent US3786035A successfully refreshed from Google Patents.
US3786035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal sulfide-arylene sulfide polymer process
Assignee: Phillips Petroleum Co
•
Filing: 1972-05-15
•
Granted: 1974-01-15
•
Expires: 1992-05-15
Abstract
Abstract AN IMPROVED PROCESS FOR THE PREPARATION OF ARYLENE SULFIDE POLYMERS IS DESCRIBED WHEREIN ALKALI METAL SULFIDE REACTANTS ARE PREPARED AND REACTED WITH POLYHALO-SUBSTITUTED AROMATIC COMPOSITIONS IN THE PREPARATION OF ARYLENE SULFIDE POLYMERS IN A REACTION MEDIUM FREE OF AIR OR OXYGEN.
Inventors
- 👤 J Scoggin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/025; C08G75/0254; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |