US2683648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying alkali metal cyanates
Assignee: Mathieson Chemical Corp
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Filing: 1952-06-12
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Granted: 1954-07-13
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Expires: 1972-06-12
Abstract
No abstract record available.
Inventors
- 👤 Homer L Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:23
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD FOR PURIFICATION OF ALKALI METAL CYANATES BY REMOVAL OF CYANIDE AND ORGANIC IMPURITIES, WHICH COMPRISES CONTACTING A FUSED ALKALI METAL CYANATE WITH AN ALKALI METAL NITRATE IN AN AMOUNT AT LEAST SUFFICIENT TO REMOVE CYANIDE AND ORGANIC IMPURITIES AND RECOVRING A SUBSTANTIALLY CYANIDE AND ORGANIC IMPURITIESFREE ALKALI METAL CYANATE.
Claim 2
Independent Claim
51 words
A METHOD FOR PURIFICATION OF ALKALI METAL CYANATES BY REMOVAL OF CYANIDE AND ORGANIC IMPURITIES, WHICH COMPRISES CONTACTING A FUSED ALKALI METAL CYANATE WITH AN ALKALI METAL NITRATE IN AN AMOUNT AT LEAST SUFFICIENT TO REMOVE CYANIDE AND ORGANIC IMPURITIES AND RECOVRING A SUBSTANTIALLY CYANIDE AND ORGANIC IMPURITIESFREE ALKALI METAL CYANATE.
References Cited (Backward Citations)
US2334723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-12 | 1958-01-11 | 1958-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-12 | 1962-01-11 | 1962-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-12 | 1966-01-11 | 1966-07-13 | $7700.00 | Window Closed / Lapsed |