US3585117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorination of homopolymers or copolymers of vinyl chloride and/or ethylene in suspension in the presence of dimethylsulfoxide
Assignee: Dynamit Nobel AG
•
Filing: 1968-07-24
•
Granted: 1971-06-15
•
Expires: 1988-07-24
Abstract
Abstract PROCESS FOR CHLORINATING HOMOPOLYMERS OR COPOLYMERS OF VINYLCHLORIDE AND/OR EHTYLENE IN AQUEOUS SUSPENSION, PREFERABLY CONTAINING HYDROCHLORIC ACID OR SULFURIC ACID, AT A TEMPERATURE OF 0 TO 100*C., UNDER ACTION OF ULTRAVIOLET LIGHT, CHARACTERIZED IN THAT DEIMETHYL SULFOXIDE, IN AN AMOUNT OF FROM 0.03 TO 20% REFERRED TO THE AMOUNT OF POLYMER, IS USED AS THE SWELLING AGENT.
Inventors
- 👤 Wilhelm Gresser
- 👤 Gunther Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:02
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18; C08F8/20
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |