US2632002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurkent sltjbb
Assignee: —
•
Filing: —
•
Granted: 1953-03-17
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Expires: 1970-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:03
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; B; B01; B01D; B01D15/00; C07C275/00; C07C275/02; C07C335/00; C07C335/02; C10; C10G; C10G2300/00; C10G2300/40; C10G2300/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR REMOVING FROM AN ORGANIC MIXTURE CONSTITUENTS WHICH FROM COMPLEXES WITH A UREA-TYPE COMPLEXING AGENT WHICH COMPRISES SUBJECTING SAID ORGANIC MIXTURE IN A CONTACTING ZONE TO COUNTERCURRENT CONTACT WITH A POLAR SOLVENT SLURRY COMPRISING 25 TO 75 PER CENT SOLID PARTICULATE ADSORBENT AND 75 TO 25 PER CENT COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, FORMING COMPLEXES BETWEEN SAID COMPLEX-FORMING CONSTITUENTS AND SAID COMPLEXING AGENT DURING SAID CONTACT, ENTRAINING SAID COMPLEX IN SAID SLURRY AND SEPARATELY REMOVING FROM SAID CONTACTING ZONE SAID COMPLEXCONTAINING SLURRY AND SAID ORGANIC MIXTURE SUBSTANTIALLY FREE FROM SAID COMPLEX-FORMING CONSTITUENTS.
Claim 2
Dependent Claim
100 words
A PROCESS FOR REMOVING FROM AN ORGANIC MIXTURE CONSTITUENTS WHICH FROM COMPLEXES WITH A UREA-TYPE COMPLEXING AGENT WHICH COMPRISES SUBJECTING SAID ORGANIC MIXTURE IN A CONTACTING ZONE TO COUNTERCURRENT CONTACT WITH A POLAR SOLVENT SLURRY COMPRISING 25 TO 75 PER CENT SOLID PARTICULATE ADSORBENT AND 75 TO 25 PER CENT COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF UREA AND THIOUREA, FORMING COMPLEXES BETWEEN SAID COMPLEX-FORMING CONSTITUENTS AND SAID COMPLEXING AGENT DURING SAID CONTACT, ENTRAINING SAID COMPLEX IN SAID SLURRY AND SEPARATELY REMOVING FROM SAID CONTACTING ZONE SAID COMPLEXCONTAINING SLURRY AND SAID ORGANIC MIXTURE SUBSTANTIALLY FREE FROM SAID COMPLEX-FORMING CONSTITUENTS.
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) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |