Patent US2686755A successfully refreshed from Google Patents.
US2686755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for effecting complex for
Assignee: —
•
Filing: —
•
Granted: 1954-08-17
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Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:51
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A PROCESS FOR EFFECTING COMPLEX FORMATION BETWEEN COMPLEXING AGENTS OF THE UREA-TYPE AND COMPOUNDS WHICH FORM COMPLEXES WITH SAID AGENTS WHICH COMPRISES CONTACTING AN ORGANIC MIXTURE CONTAINING SAID COMPLEX-FORMING COMPOUNDS WITH A SATURATED ANHYDROUS LIQUID AMMONIA SOLUTION OF SAID UREA-TYPE COMPLEXING AGENTS CONTAINING 1 TO 10 WEIGHT PER CENT OXYGENATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND KETONES, EFFECTING SAID CONTACT AT A TEMPERATURE LESS THAN 50* C. AND AT A PRESSURE SUFFICIENT TO MAINTAIN SUBSTANTIALLY LIQUID PHASE OPERATION WITH THE RESULTING FORMATION OF A SOLID COMPLEX OF UREA AND SAID COMPLEXFORMING COMPOUNDS, SEPARATING A MIXTURE COMPRISING SAID COMPLEX AND SAID AMMONIA SOLUTION FROM SAID ORGANIC MIXTURE, HEATING SAID MIXTURE TO A TEMPERATURE BETWEEN 30 AND 100* C. AND AT
Claim 2
Dependent Claim
122 words
A PROCESS FOR EFFECTING COMPLEX FORMATION BETWEEN COMPLEXING AGENTS OF THE UREA-TYPE AND COMPOUNDS WHICH FORM COMPLEXES WITH SAID AGENTS WHICH COMPRISES CONTACTING AN ORGANIC MIXTURE CONTAINING SAID COMPLEX-FORMING COMPOUNDS WITH A SATURATED ANHYDROUS LIQUID AMMONIA SOLUTION OF SAID UREA-TYPE COMPLEXING AGENTS CONTAINING 1 TO 10 WEIGHT PER CENT OXYGENATED HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS AND KETONES, EFFECTING SAID CONTACT AT A TEMPERATURE LESS THAN 50* C. AND AT A PRESSURE SUFFICIENT TO MAINTAIN SUBSTANTIALLY LIQUID PHASE OPERATION WITH THE RESULTING FORMATION OF A SOLID COMPLEX OF UREA AND SAID COMPLEXFORMING COMPOUNDS, SEPARATING A MIXTURE COMPRISING SAID COMPLEX AND SAID AMMONIA SOLUTION FROM SAID ORGANIC MIXTURE, HEATING SAID MIXTURE TO A TEMPERATURE BETWEEN 30 AND 100* C. AND AT
References Cited (Backward Citations)
US2520716A
Cited
US2569984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |