US2680082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of dextrose
Assignee: Corn Products Refining Co
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Filing: 1951-03-22
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Granted: 1954-06-01
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Expires: 1971-03-22
Abstract
No abstract record available.
Inventors
- 👤 William B Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:49
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06; C13K1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN THE PROCESS OF OBTAINING CRYSTALLINE DEXTROSE FROM A LIQUOR RESULTING FROM THE ACID CONVERSION OF STARCH WHICH COMPRISES SUBJECTING SAID LIQUOR TO REFINING AND CRYSTALLIZING OPERATIONS, THE IMPROVEMENT WHICH CONSISTS IN SUCCESSIVELY SUBJECTING SAID LIQUOR TO TREATMENT WITH BENTONITE TO CLARIFY THE LIQUOR; A SUCCESSION OF DE-MINERALIZING AND REFINING STEPS IN EACH OF WHICH THE LIQUOR IS TREATED FIRST WITH AN ANION EXCHANGE RESIN, THEN A CATION EXCHANGE RESIN, NEXT AN ANION EXCHANGE RESIN, AND FINALLY A CATION EXCHANGE RESIN; WITH ACTIVATED CARBON FOR FINAL DECOLORIZATION OF THE LIQUOR; THEREAFTER CONCENTRATING THE LIQUOR AND SUBJECTING THE CONCENTRATED LIQUOR TO CRYSTALLIZATON; PURGING THE MASSECUITE OF ITS MOTHER LIQUOR; TREATING THE MOTHER LIQUOR WITH AN ANION EXCHANGER OF GREATER BASICITY THAN USED IN PRECEDING STEPS; ADDING THE MOTHER LIQUOR TO FRESH STARCH SLURRY; CONVERTING THE MIXTURE OF MOTHER LIQUOR AND STARCH; AND
Claim 2
Dependent Claim
141 words
IN THE PROCESS OF OBTAINING CRYSTALLINE DEXTROSE FROM A LIQUOR RESULTING FROM THE ACID CONVERSION OF STARCH WHICH COMPRISES SUBJECTING SAID LIQUOR TO REFINING AND CRYSTALLIZING OPERATIONS, THE IMPROVEMENT WHICH CONSISTS IN SUCCESSIVELY SUBJECTING SAID LIQUOR TO TREATMENT WITH BENTONITE TO CLARIFY THE LIQUOR; A SUCCESSION OF DE-MINERALIZING AND REFINING STEPS IN EACH OF WHICH THE LIQUOR IS TREATED FIRST WITH AN ANION EXCHANGE RESIN, THEN A CATION EXCHANGE RESIN, NEXT AN ANION EXCHANGE RESIN, AND FINALLY A CATION EXCHANGE RESIN; WITH ACTIVATED CARBON FOR FINAL DECOLORIZATION OF THE LIQUOR; THEREAFTER CONCENTRATING THE LIQUOR AND SUBJECTING THE CONCENTRATED LIQUOR TO CRYSTALLIZATON; PURGING THE MASSECUITE OF ITS MOTHER LIQUOR; TREATING THE MOTHER LIQUOR WITH AN ANION EXCHANGER OF GREATER BASICITY THAN USED IN PRECEDING STEPS; ADDING THE MOTHER LIQUOR TO FRESH STARCH SLURRY; CONVERTING THE MIXTURE OF MOTHER LIQUOR AND STARCH; AND
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) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |