Patent US2845369A successfully refreshed from Google Patents.
US2845369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exchange purification of fructose solution
Assignee: Abbott Laboratories
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Filing: 1955-08-29
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Granted: 1958-07-29
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Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Raymond V Davis
- 👤 Ira B Cushing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:22
CPC Classifications
C; C13; C13K; C13K11/00; C12; C12P; C12P19/00; C12P19/02; Y; Y10; Y10S; Y10S435/00; Y10S435/803
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS OF PURIFYING SUGAR SOLUTIONS TO IMPROVE THE COLOR STABILITY THEREOF WHICH COMPRISES RAISING THE PH OF A SOLUTION OF AN ACETOBACTER OXIDIZED POLYHYDRIC SUGAR ALCOHOL CONTAINING POTENTIAL COLOR-FORMING BODIES TO A PH IN EXCESS OF ABOUT PH 7 AND NOT SUBSTANTIALLY ABOVE PH 11 TO CAUSE THE SAID COLOR-FORMING BODIES TO CONDENSE, AND INTIMATELY CONTACTING THE SAID SOLUTION CONTAINING THE CONDENSED COLOR-FORMING BODIES WITH A MASS OF STRONGLY ACIDIC CATION EXCHANGE RESIN AND THEREAFTER CONTACTING WITH A MASS OF STRONGLY BASIC ANION EXCHANGE RESIN, AND THE CONTACT BEWTEEN THE SAID SOLUTION AND EACH SAID RESIN BEING TERMINATED BEFORE AN APPRECIABLE AMOUNT OF THE FRUCTOSE THEREIN IS DEGRADED; WHEREBY ELIMINATION OF A SUBSTANTIAL PORPORTION OF THE COLOR-FORMING BODIES RESPONSIBLE FOR TH FORMATION COLOR WHEN AUTOCLAVING THE SAID SOULTION IS EFFECTED.
Claim 2
Dependent Claim
131 words
A PROCESS OF PURIFYING SUGAR SOLUTIONS TO IMPROVE THE COLOR STABILITY THEREOF WHICH COMPRISES RAISING THE PH OF A SOLUTION OF AN ACETOBACTER OXIDIZED POLYHYDRIC SUGAR ALCOHOL CONTAINING POTENTIAL COLOR-FORMING BODIES TO A PH IN EXCESS OF ABOUT PH 7 AND NOT SUBSTANTIALLY ABOVE PH 11 TO CAUSE THE SAID COLOR-FORMING BODIES TO CONDENSE, AND INTIMATELY CONTACTING THE SAID SOLUTION CONTAINING THE CONDENSED COLOR-FORMING BODIES WITH A MASS OF STRONGLY ACIDIC CATION EXCHANGE RESIN AND THEREAFTER CONTACTING WITH A MASS OF STRONGLY BASIC ANION EXCHANGE RESIN, AND THE CONTACT BEWTEEN THE SAID SOLUTION AND EACH SAID RESIN BEING TERMINATED BEFORE AN APPRECIABLE AMOUNT OF THE FRUCTOSE THEREIN IS DEGRADED; WHEREBY ELIMINATION OF A SUBSTANTIAL PORPORTION OF THE COLOR-FORMING BODIES RESPONSIBLE FOR TH FORMATION COLOR WHEN AUTOCLAVING THE SAID SOULTION IS EFFECTED.
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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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |