US3790524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing vulcanized epihalohydrin polymers
Assignee: Japanese Geon Co Ltd
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Filing: 1971-04-20
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Granted: 1974-02-05
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Expires: 1991-04-20
Abstract
Abstract A PROCESS FOR PREPARING VULCANIZED EPIHALOHYDRIN POLYMERS WHICH COMPRISES HEATING AT LEAST A POLYMER SELECTED FROM THE GROUP CONSISTING OF A HOMOPOLYMER OF EPIHALOHYDRIN AND A COPOLYMER OF EPIHALOHYDRIN WITH AT LEAST ONE OTHER COPOLYMERIZABLE MONOMER IN THE PRESENCE OF (A) 0.1-10 PARTS BY WEIGHT OF AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYALKYLENEPOLYAMINES, POLYALKYLENEPOLYAMINE CARBAMATES AND THIOUREAS WHICH ARE OPTIONALLY SUBSTITUTED WITH ALKYL GROUPS OF 1-4 CARBON ATOMS LEAVING AT LEAST ONE HYDROGEN ATOM UNSUBSTITUTED, (B) 1-20 PARTS BY WEIGHT OF MAGNESIUM OXIDE AND (C9 0.2-5 PARTS BY WEIGHT OF 2-MERCAPTOBENZIMIDAZOLE.
Inventors
- 👤 Y Saito
- 👤 H Sasaki
- 👤 H Yamada
- 👤 K Kimura
- 👤 M Yamaguchi
- 👤 H Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:34
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/0008; C08K5/0025
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |