US2790801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of cyanuric
Assignee: —
•
Filing: —
•
Granted: 1957-04-30
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Expires: 1974-04-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:37
CPC Classifications
C; C07; C07D; C07D251/00; C07D251/02; C07D251/12; C07D251/26; C07D251/30; C07D251/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR THE PREPARATION OF CYANURIC ACID FROM UREA, WHICH COMPRISES MIXING 100 MOL EQUIVALENTS OF UREA WITH AN AMOUNT OF 66 BE''. SULFURIC ACID COMPRISED BETWEEN 1 TO 50 MOL EQUIVALENTS, HEATING SLOWLY TO 180-200*C., MAINTAINING THIS TEMPERATURE UNTIL EVOLUTION OF AMMONIA HAS CEASED, COOLING THE REACTION MASS AND ISOLATING CYANURIC ACID BY EXTRACTING AMMONIUM SULPHATE CONTAINED IN THE REACTION MASS WITH BOILING WATER AND SEPARATING THE CRYSTALLINE RESIDUE FROM THE SOLUTION.
Claim 2
Dependent Claim
74 words
A PROCESS FOR THE PREPARATION OF CYANURIC ACID FROM UREA, WHICH COMPRISES MIXING 100 MOL EQUIVALENTS OF UREA WITH AN AMOUNT OF 66 BE''. SULFURIC ACID COMPRISED BETWEEN 1 TO 50 MOL EQUIVALENTS, HEATING SLOWLY TO 180-200*C., MAINTAINING THIS TEMPERATURE UNTIL EVOLUTION OF AMMONIA HAS CEASED, COOLING THE REACTION MASS AND ISOLATING CYANURIC ACID BY EXTRACTING AMMONIUM SULPHATE CONTAINED IN THE REACTION MASS WITH BOILING WATER AND SEPARATING THE CRYSTALLINE RESIDUE FROM THE SOLUTION.
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) | 1960-04-29 | 1960-10-29 | 1961-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-29 | 1964-10-29 | 1965-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-29 | 1968-10-29 | 1969-04-30 | $7700.00 | Window Closed / Lapsed |