Patent US3637629A successfully refreshed from Google Patents.
US3637629A
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US
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Silver salt catalysts for preparing triazines and cross-linked nitrile polymers
Assignee: Hooker Chemical Corp
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Filing: 1970-11-12
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Granted: 1972-01-25
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Expires: 1990-11-12
Abstract
Abstract THIS INVENTION RELATES (A) TO A PROCESS FOR PRODUCING A TRIAZINE BY REACTION OF A PERFLUOROALKANE NITRILE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SILVER SALT, AND (B) THE CROSS-LINKING POLYMER OR COPOLYMER CONTAINING GREATER THAN THE AVERAGE OF ONE CYANOHALOALKYL GROUP PER MOLECULE OF THE POLYMER OR COPOLYMER, TO FORM A CROSS-LINKED POLYMER OR COPOLYMER, IN THE PRESENCE OF A SILVER SALT.
Inventors
- 👤 Edwin Dorfman
- 👤 William E Emerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:14
CPC Classifications
C; C08; C08F; C08F8/00; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0638; C08G73/065; C08G73/0655; C08G73/0661
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |