US3594451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chlorosulfonated polyethylene graft polymers
Assignee: EIDP Inc
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Filing: 1967-10-26
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Granted: 1971-07-20
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Expires: 1987-10-26
Abstract
Abstract AN ELASTOMERIC GRAFT POLYMER OF AN AMORPHOUS, HOMOGENEOUSLY CHLOROSULFONATED POLYETHYLENE HAVING GRAFTED THEREON POLYMER CHAIN UNITS DERIVED FROM THE MONOMERS STYRENE, VINYL CHLORIDE, CHLOROSTYRENE, LOWER-ALKYL SUBSTITUTED STYRENE, VINYLIDENE CHLORIDE, METHACRYLONITRILE, LOWER-ALKYL METHACRYLATES, OR A MIXTURE OF 2,3-DICHLOROBUTADIENE-1,3 AND CHLOROPRENTE, THE WEIGHT OF SAID POLYMER CHAIN UNITS BEING FROM 10% TO 40% (PREFERABLY 15% TO 30%) OF SAID GRAFT POLYMER, AND SAID CHLOROSULFONATED POLYETHYLENE CONTAINING 0.5 TO 5 (PREFERABLY 1 TO 2) WEIGHT PERCENT SULFUR AND 25 TO 45 (PREFERABLY 28 TO 35) WEIGHT PERCENT CHLORINE.
Inventors
- 👤 Robert William Keown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F255/023
Claims Analysis
Total Claims: 0
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |