US3039936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dextrose from starch
Assignee: Union Starch and Refining Co
•
Filing: 1960-06-07
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Granted: 1962-06-19
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Expires: 1980-06-07
Abstract
No abstract record available.
Inventors
- 👤 James F Lenney
- 👤 Lyman R Shively
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:36
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/20; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/839; Y10S435/911; Y10S435/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS OF HYDROLYZING STARCH, THE STEPS COMPRISING HEATING AN AQUEOUS STARCH SUSPENSION CONTAINING ABOUT 10-45% BY WEIGHT OF STARCH TO ABOUT 65*-80*C. IN THE PRESENCE OF A THERMOSTABLE ALPHA-AMYLASE, MAINTAINING THE SUSPENSION WITHIN SAID TEMPERATURE RANGE UNTIL THE STARCH IS LIQUEFIED AND THEREAFTER MAINTAINING THE SOLUTION AT A TEMPERATURE OF 30-80*C. UNTIL A D.E. OF 25 TO 35% IS ATTAINED, ADDING A SACCHARIFYING ENZYME PREPARATION OBTAINED FROM A SPECIES OF THE RHIZOPUS GENUS, AND INCUBATING AT ABOUT 35 TO 55*C. WHEREBY A SOLUTION HAVING A D.E. OF AT LEAST 98.5 BASED ON THE SOLUBLE CARBOHYDRATE PRESENT IS OBTAINED.
Claim 2
Dependent Claim
100 words
IN A PROCESS OF HYDROLYZING STARCH, THE STEPS COMPRISING HEATING AN AQUEOUS STARCH SUSPENSION CONTAINING ABOUT 10-45% BY WEIGHT OF STARCH TO ABOUT 65*-80*C. IN THE PRESENCE OF A THERMOSTABLE ALPHA-AMYLASE, MAINTAINING THE SUSPENSION WITHIN SAID TEMPERATURE RANGE UNTIL THE STARCH IS LIQUEFIED AND THEREAFTER MAINTAINING THE SOLUTION AT A TEMPERATURE OF 30-80*C. UNTIL A D.E. OF 25 TO 35% IS ATTAINED, ADDING A SACCHARIFYING ENZYME PREPARATION OBTAINED FROM A SPECIES OF THE RHIZOPUS GENUS, AND INCUBATING AT ABOUT 35 TO 55*C. WHEREBY A SOLUTION HAVING A D.E. OF AT LEAST 98.5 BASED ON THE SOLUBLE CARBOHYDRATE PRESENT IS OBTAINED.
References Cited (Backward Citations)
US2567000A
Cited
US2583451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |