Patent US2719145A successfully refreshed from Google Patents.
US2719145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for effecting complex
Assignee: —
•
Filing: —
•
Granted: 1955-09-27
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Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:55
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE PROCESS FOR EFFECTING COMPLEX FORMATION BY AGITATED CONTACT OF A LIQUID MASS COMPRISING AN ORGANIC MIXTURE CONTAINING CONSTITUENTS WHICH FORM SOLID COMPLEXES WITH A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, AND A SLURRY OF SAID COMPLEXING AGENT IN AN OXYGENATED HYDROCARBON MEDIUM, THE IMPROVEMENT WHICH COMPRISES SUBJECTING THE ENTIRE RESULTING AGITATED REACTION MIXTURE COMPRISING COMPLEX, ORGANIC MIXTURE AND OXYGENATED HYDROCARBON SLURRY TO BLOWING WITH AN INERT GAS FOR A PERIOD OF TIME TO REMOVE SUBSTANTIALLY ALL OF THE OXYGENATED HYDROCARBON THEREFROM PRIOR TO SEPARATION OF THE SOLID PHASE COMPRISING COMPLEX AND EXCESS COMPLEXING AGENT FROM SAID REACTION MIXTURE.
Claim 2
Dependent Claim
105 words
IN THE PROCESS FOR EFFECTING COMPLEX FORMATION BY AGITATED CONTACT OF A LIQUID MASS COMPRISING AN ORGANIC MIXTURE CONTAINING CONSTITUENTS WHICH FORM SOLID COMPLEXES WITH A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, AND A SLURRY OF SAID COMPLEXING AGENT IN AN OXYGENATED HYDROCARBON MEDIUM, THE IMPROVEMENT WHICH COMPRISES SUBJECTING THE ENTIRE RESULTING AGITATED REACTION MIXTURE COMPRISING COMPLEX, ORGANIC MIXTURE AND OXYGENATED HYDROCARBON SLURRY TO BLOWING WITH AN INERT GAS FOR A PERIOD OF TIME TO REMOVE SUBSTANTIALLY ALL OF THE OXYGENATED HYDROCARBON THEREFROM PRIOR TO SEPARATION OF THE SOLID PHASE COMPRISING COMPLEX AND EXCESS COMPLEXING AGENT FROM SAID 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) | 1958-09-26 | 1959-03-28 | 1959-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-26 | 1963-03-28 | 1963-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-26 | 1967-03-28 | 1967-09-27 | $7700.00 | Window Closed / Lapsed |