Patent US3736320A successfully refreshed from Google Patents.
US3736320A
Expired / Lapsed
US
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Method of preparing hexahydro-1,3,5-triacyl-s-triazines
Assignee: GAF Chemicals Corp
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Filing: 1970-08-17
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Granted: 1973-05-29
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Expires: 1990-08-17
Abstract
Abstract A PROCESS IS PROVIDED FOR THE PREPARATION OF HEXAHYDRO1,3,5-TRIACYL-S-TRIAZINES HAVING THE STRUCTURAL FORMULA: 1,3,5-TRI(R-CO-)PERHYDRO-S-TRIAZINE WHEREIN R IS A LOWER ALIPHATIC HYDROCARBON RADICAL OR A HALOGENATED LOWER ALIPHATIC HYDROCARBON RADICAL COMPRISING REACTING A POLYMERIC FORMALDEHYDE, A LOWER ALIPHATIC ANHYDRIDE AND A LOWER ALIPHATIC OR HALOGENATED LOWER ALIPHATIC NITRILE IN THE PRESENCE OF A CATALYTICALLY EFFECTIVE AMOUNT OF AN ARYL SULFONIC ACID CONTAINING FROM ABOUT 0.5 TO ABOUT 7.0% SULFURIC ACID AND FROM 0 TO ABOUT 10% WATER, AND THEREAFTER RECOVERING THE RESULTING PRODUCT.
Inventors
- 👤 G Karustis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:43
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/04
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |