US4017363A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high purity glucose syrups
Assignee: Novo Nordisk AS
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Filing: 1975-12-19
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Granted: 1977-04-12
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Expires: 1995-12-19
Abstract
Abstract Saccharification of 10-20% solid content dextrin solutions for 15-75 hours at amyloglucosidase enzyme dosage levels of 0.3-1.0 AG u/g of solids results in glucose syrups with purity levels exceeding 98%. Glucose purity levels in excess of 98.5% can be achieved if the dextrin solution is formed by enzymatic liquefaction of starch, and saccharification is carried out for 15-25 hours with 0.4-0.8 AG u/g.
Inventors
- 👤 William H. McMullen
- 👤 Rosemary Andino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:28
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/836
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
81 words
A process for converting starch into a glucose syrup containing at least 98% glucose on a dry solids basis comprising: a. enzymatically liquefying a starch slurry to produce thereby a dextrin solution; b. saccharifying the resulting dextrin solution at a 10-20% w/w dsb solids content enzymatically for from about 15-75 hours with amyloglucosidase at an enzyme dosage of 0.30-1.0 AG units per gram of starch solids; c. halting the saccharification when the glucose content exceeds 98% on a dry solids basis.
Claim 2
Dependent Claim
81 words
A process for converting starch into a glucose syrup containing at least 98% glucose on a dry solids basis comprising: a. enzymatically liquefying a starch slurry to produce thereby a dextrin solution; b. saccharifying the resulting dextrin solution at a 10-20% w/w dsb solids content enzymatically for from about 15-75 hours with amyloglucosidase at an enzyme dosage of 0.30-1.0 AG units per gram of starch solids; c. halting the saccharification when the glucose content exceeds 98% on a dry solids basis.
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein the enzyme dosage is in the range of 0.4-0.8 AG units/g and the saccharification time period is in the range of 15-25 hours.
Claim 4
Independent Claim
62 words
A method for saccharifying a dextrin solution to glucose syrups exceeding 98% glucose on a dry solids basis which comprises: a. saccharifying a 10-20% w/w dextrin solution enzymatically from about 15-75 hours with amyloglucosidase at an enzyme dosage of 0.3-1.0 AG units per gram of dextrin solids; b. halting the saccharification when the glucose content exceeds 98% on a dry solids basis.
Claim 5
Independent Claim
62 words
A method for saccharifying a dextrin solution to glucose syrups exceeding 98% glucose on a dry solids basis which comprises: a. saccharifying a 10-20% w/w dextrin solution enzymatically from about 15-75 hours with amyloglucosidase at an enzyme dosage of 0.3-1.0 AG units per gram of dextrin solids; b. halting the saccharification when the glucose content exceeds 98% on a dry solids basis.
Claim 6
Dependent Claim
29 words
The process of claim 3 wherein the enzyme dosage is in the range of 0.4-0.8 AG units/g and the saccharification time period is in the range of 15-25 hours.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |