US3630978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized halogen-containing acrylonitrile polymer composition
Assignee: Japan Exlan Co Ltd
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Filing: 1969-09-15
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Granted: 1971-12-28
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Expires: 1989-09-15
Abstract
Abstract DISCOLORATION OF AQUEOUS SOLUTIONS OF ACRYLONITRILE POLYMERS BY HEAT AND/OR AGING, PARTICULARLY THOSE POLYMERS CONTAINING HALOGEN, IS PREVENTED BY THE ADDITION THERETO OF A COMBINATION OF A WATER-SOLUBLE INORGANIC BISULFITE AND EITHER A TRIORGANOPHOSPHITE OR AN ORGANOTIN CARBOXYLATE.
Inventors
- 👤 Iyohiko Nakanome
- 👤 Kenji Takeya
- 👤 Hiroshi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/30; C08K13/00; C08K13/02
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |