US2698344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of guanidine sulfamate
Assignee: Teck Metals Ltd
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Filing: 1950-10-04
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Granted: 1954-12-28
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Expires: 1970-10-04
Abstract
No abstract record available.
Inventors
- 👤 Mills James Roland
- 👤 Robinson Joseph Newton
- 👤 Miller Frederick John Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:16
CPC Classifications
C; C07; C07C; C07C277/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
THE METHOD OF PRODUCING GUANIDINE SULPHAMATE WHICH COMPRISES THE STEP OF REACTING AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200* C. TO ABOUT 330* C. AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, BIURET AND CYANURIC ACID WITH AMMONIUM SULPHAMATE IN THE PRESENCE OF ADDED AMMONIA AND UNDER A PRESSURE OF AMMONIA ABOVE ABOUT 200 POUNDS PER SQUARE INCH, THE AMMONIUM SULPHAMATE BEING PRESENT IN THE MOL RATIO EQUIVALENT TO AT LEAST ABOUT 2 MOLS AMMONIUM SULPHAMATE PER MOL UREA, AND RECOVERING GUANIDINE SULPHAMATE FROM THE REACTION MIXTURE.
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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) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |