US3215625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric liquid anion exchange process
Assignee: General Mills Inc
•
Filing: 1962-11-21
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Granted: 1965-11-02
•
Expires: 1982-11-21
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Dunning
- 👤 James M White
- 👤 Wittcoff Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
THE PROCESS OF REMOVING ORGANIC ANIONIC MATERIAL FROM AQUEOUS SOLUTIONS THEREOF WHICH COMPRISES: (1) CONTACTING SAID AQUEOUS SOLUTIONS WITH A LIQUID WATERIMMISCIBLE ORGANIC PHASE COMPRISING AN ORGANIC SOLVENT SOLUTION OF A POLYMER CHARACTERIZED BY HAVING 2 TO ABOUT 40 RECURING STRUCTURAL UNITS SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
48 words
THE PROCESS OF REMOVING ORGANIC ANIONIC MATERIAL FROM AQUEOUS SOLUTIONS THEREOF WHICH COMPRISES: (1) CONTACTING SAID AQUEOUS SOLUTIONS WITH A LIQUID WATERIMMISCIBLE ORGANIC PHASE COMPRISING AN ORGANIC SOLVENT SOLUTION OF A POLYMER CHARACTERIZED BY HAVING 2 TO ABOUT 40 RECURING STRUCTURAL UNITS SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
US3074820A
Cited
US3123553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |