Patent US2373928A successfully refreshed from Google Patents.
Patent US3088948A successfully refreshed from Google Patents.
US3088948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tris
Assignee: —
•
Filing: —
•
Granted: 1963-05-07
•
Expires: 1980-05-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A TRIS-2-HYDROXYALKYL ISOCYANURATE OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A TRIS-2-HYDROXYALKYL ISOCYANURATE OF THE FORMULA:
Claim 3
Independent Claim
84 words
A METHOD OF PREPARING A TRIS-2-HYDROXYALKYL ISOCYANURATE WHICH COMPRISES REACTING CYANURIC ACID WITH AN ALKYLENE OXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE, PROPYLENE OXIDE AND BUTYLENE OXIDE, IN MOL RATIO OF ABOUT 2 TO 5 MOLS OF ALKYLENE OXIDE PER MOL OF CYANURIC ACID AT TEMPERATURE OF ABOUT 25* TO 140*C. IN THE PRESENCE OF AN INERT SOLVENT FOR BOTH THE CYANURIC ACID AND ALKYLENE OXIDE AND AN ALKALINE CATALYST, AND RECOVERING THE TRIS-2-HYDROXYALKYL ISOCYANURATE THEREBY FORMED FROM THE RESULTANT REACTION MASS.
Claim 4
Independent Claim
84 words
A METHOD OF PREPARING A TRIS-2-HYDROXYALKYL ISOCYANURATE WHICH COMPRISES REACTING CYANURIC ACID WITH AN ALKYLENE OXIDE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE OXIDE, PROPYLENE OXIDE AND BUTYLENE OXIDE, IN MOL RATIO OF ABOUT 2 TO 5 MOLS OF ALKYLENE OXIDE PER MOL OF CYANURIC ACID AT TEMPERATURE OF ABOUT 25* TO 140*C. IN THE PRESENCE OF AN INERT SOLVENT FOR BOTH THE CYANURIC ACID AND ALKYLENE OXIDE AND AN ALKALINE CATALYST, AND RECOVERING THE TRIS-2-HYDROXYALKYL ISOCYANURATE THEREBY FORMED FROM THE RESULTANT REACTION MASS.
References Cited (Backward Citations)
US2381121A
Cited
US2414289A
Cited
US2905671A
Cited
US2716137A
Cited
US2809942A
Cited
US2866802A
Cited
GB814511A
Cited
US2977371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-06 | 1966-11-05 | 1967-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-06 | 1970-11-05 | 1971-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-06 | 1974-11-05 | 1975-05-07 | $7700.00 | Window Closed / Lapsed |