US2762843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of guanidine from so co, and nh
Assignee: Individual
•
Filing: 1952-06-17
•
Granted: 1956-09-11
•
Expires: 1972-06-17
Abstract
No abstract record available.
Inventors
- 👤 Boivin Jean Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:42
CPC Classifications
C; C07; C07C; C07C277/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS OF PREPARING A GUANIDINE SULFATE COMPRISING REACTING CARBON DIOXIDE, AMMONIA AND SULPHUR DIOXIDE AT A TEMPERATURE WITHIN THE RANGE OF SUBSTANTIALLY 300*-400* C. AND AT A PRESSURE IN EXCESS OF 200 P. S. I. EMPLOYING A MOLECULAR RATIO OF SUBSTANTIALLY 1 MOL OF CO2: 3 MOLS OF SO2; 7 MOLS OF NH3.
Claim 2
Dependent Claim
54 words
A PROCESS OF PREPARING A GUANIDINE SULFATE COMPRISING REACTING CARBON DIOXIDE, AMMONIA AND SULPHUR DIOXIDE AT A TEMPERATURE WITHIN THE RANGE OF SUBSTANTIALLY 300*-400* C. AND AT A PRESSURE IN EXCESS OF 200 P. S. I. EMPLOYING A MOLECULAR RATIO OF SUBSTANTIALLY 1 MOL OF CO2: 3 MOLS OF SO2; 7 MOLS OF NH3.
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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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |