US2690956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making sodium cyanate
Assignee: Mathieson Chemical Corp
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Filing: 1950-11-21
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Granted: 1954-10-05
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Expires: 1970-11-21
Abstract
No abstract record available.
Inventors
- 👤 Horst William P Ter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:09
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF MANUFACTURING SODIUM CYANATE WHICH COMPRISES HEATING UREA AND A CARBONATE OF SODA ADMIXED IN THE RATIO OF ABOUT 2 TO 2.6 MOLES OF UREA PER MOLE OF THE CARBONATE IN THE FUSED STATE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 525* TO 650* C., LIMITING THE REACTION TIME IN THE FUSED STATE TO NOT MORE THAN ABOUT 4 MINUTES, COOLING THE FUSED MATERIAL AND RECOVERING THE SODIUM CYANATE PRODUCT.
Claim 2
Independent Claim
73 words
THE METHOD OF MANUFACTURING SODIUM CYANATE WHICH COMPRISES HEATING UREA AND A CARBONATE OF SODA ADMIXED IN THE RATIO OF ABOUT 2 TO 2.6 MOLES OF UREA PER MOLE OF THE CARBONATE IN THE FUSED STATE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 525* TO 650* C., LIMITING THE REACTION TIME IN THE FUSED STATE TO NOT MORE THAN ABOUT 4 MINUTES, COOLING THE FUSED MATERIAL AND RECOVERING THE SODIUM CYANATE PRODUCT.
References Cited (Backward Citations)
DE590232C
Cited
GB339220A
Cited
US1915425A
Cited
GB339371A
Cited
FR713520A
Cited
GB359559A
Cited
FR39282E
Cited
US1971009A
Cited
US2345826A
Cited
US2546551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |