US2649390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating sugar solutions with ion-exchange resins
Assignee: Rohm and Haas Co
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Filing: 1950-11-13
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Granted: 1953-08-18
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Expires: 1970-11-13
Abstract
No abstract record available.
Inventors
- 👤 James C Winters
- 👤 Kunin Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:08
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
THE METHOD OF PURIFYING A DILUTE SUCROSE SOLUTION CONTAINING DISSOLVED SALTS WHICH COMPRISES THE THREE ESSENTIAL STEPS OF DIRECTING THE SOLUTION FIRST THROUGH A BED OF CATION-EXCHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE CARBOXYLIC ACID GROUPS, NEXT THROUGH A BED OF ANION-EXCHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE QUATERNARY AMMONIUM HYDROXYL GROUPS, AND THEN THROUGH A BED OF CATION-EX CHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE CARBOXYLIC ACID GROUPS.
Claim 2
Independent Claim
75 words
THE METHOD OF PURIFYING A DILUTE SUCROSE SOLUTION CONTAINING DISSOLVED SALTS WHICH COMPRISES THE THREE ESSENTIAL STEPS OF DIRECTING THE SOLUTION FIRST THROUGH A BED OF CATION-EXCHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE CARBOXYLIC ACID GROUPS, NEXT THROUGH A BED OF ANION-EXCHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE QUATERNARY AMMONIUM HYDROXYL GROUPS, AND THEN THROUGH A BED OF CATION-EX CHANGE RESIN IN WHICH THE PRINCIPAL POLAR GROUPS ARE CARBOXYLIC ACID GROUPS.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |