Patent US2729637A successfully refreshed from Google Patents.
US2729637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing cyanuric
Assignee: —
•
Filing: —
•
Granted: 1956-01-03
•
Expires: 1973-01-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:59
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
33 words
A PROCESS FOR THE PREPARATION OF CYANURIC ACID COMSISTING OF, REACTING UREA AND THIONYL CHLORIDE TOGETHER UNDER REFLUX AT A TEMPERATURE OF A WATER BATH UNTIL AFTER AN EXOTHERMIC REACTION HAS TAKEN PLACE.
Claim 2
Dependent Claim
33 words
A PROCESS FOR THE PREPARATION OF CYANURIC ACID COMSISTING OF, REACTING UREA AND THIONYL CHLORIDE TOGETHER UNDER REFLUX AT A TEMPERATURE OF A WATER BATH UNTIL AFTER AN EXOTHERMIC REACTION HAS TAKEN PLACE.
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |