Patent US3708461A successfully refreshed from Google Patents.
US3708461A
Expired / Lapsed
US
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Process for the vulcanization of epihalohydrin polymers
Assignee: Japanese Geon Co Ltd
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Filing: 1970-12-14
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Granted: 1973-01-02
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Expires: 1990-12-14
Abstract
Abstract A PROCESS FOR THE VULCANIZATION OF EPIHALOHYDRIN POLYMERS, WHICH COMPRISES HEATING AN EPIHALOHYDRIN HOMOPOLYMER OR A COPOLYMER OF AN EPIHALOHYDRIN WITH AT LEAST ONE OTHER EPOXIDE, IN THE PRESENCE OF, PER 100 PARTS BY WEIGHT OF THE POLYMER, 0.2-10.0 PARTS BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF 2MERCAPTOIMIDAZOLINES AND THIOUREAS WHICH ARE OPTIONALLY SUBSTITUTED WITH ALKYL RADICALS OF 1-4 CARBON ATOMS LEAVING AT LEAST ONE HYDROGEN ATOMS UNSUBSTITUTED, AND 0.210.0 PARTS BY WEIGHT OF AT LEAST ONE ORGANIC POLYSULFIDE.
Inventors
- 👤 H Fukuda
- 👤 T Karastu
- 👤 H Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/39; C08K5/40; C08K5/405
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |