Patent US2889198A successfully refreshed from Google Patents.
US2889198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cyanates
Assignee: Emery Oleochemicals LLC
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Filing: 1956-10-01
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Granted: 1959-06-02
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Fred O Barrett
- 👤 Kamlet Jonas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:28
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF PREPARING A CYANTE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI AND AN ALKALINE EARTH CYANATE WHICH COMPRISES, FORMING A SOLUTION OF UREA AND A SALT SELECTED FROM THE GROUP CONSISTING OF A PHENOLATE AND A CRESOLATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL AND AN ALKALINE EARTH METAL IN A HIGH BOILING POLAR ORGANIC SOLVENT WHICH IS NOT A SOLVENT FOR SAID CYANATES, HEATING SAIKD SOLUTION TO A TEMPERAATURE SUBSTANTIALLY FROM 100*C. TO UNTIL THE EVOLUTION OF AMMONIA CEASES, AND FILTERING THE SOLUTION TO SEPARATE THE CYANATE FROM THE SOLVENT.
Claim 2
Independent Claim
99 words
THE METHOD OF PREPARING A CYANTE SELECTED FROM THE GROUP CONSISTING OF AN ALKALI AND AN ALKALINE EARTH CYANATE WHICH COMPRISES, FORMING A SOLUTION OF UREA AND A SALT SELECTED FROM THE GROUP CONSISTING OF A PHENOLATE AND A CRESOLATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL AND AN ALKALINE EARTH METAL IN A HIGH BOILING POLAR ORGANIC SOLVENT WHICH IS NOT A SOLVENT FOR SAID CYANATES, HEATING SAIKD SOLUTION TO A TEMPERAATURE SUBSTANTIALLY FROM 100*C. TO UNTIL THE EVOLUTION OF AMMONIA CEASES, AND FILTERING THE SOLUTION TO SEPARATE THE CYANATE FROM THE SOLVENT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |