US3616219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improved enzyme convertibility of starch
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1970-03-09
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Granted: 1971-10-26
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Expires: 1990-03-09
Abstract
Abstract Process for hydrolyzing starch with alpha-amylase in which aqueous starch hydrolyzable by alpha-amylase, a water-insoluble calcium compound as an alpha-amylase thermostabilizing agent, and an alkali metal orthophosphate buffering agent are combined with an alpha-amylase preparation for a time sufficient to allow hydrolysis of the starch to occur.
Inventors
- 👤 Henry C Massey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:03
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
The process of claim 1 wherein said calcium compound is calcium carbonate.
Claim 2
Dependent Claim
24 words
The process of claim 1 wherein said alkali metal orthophosphate buffering agent is a mixture of monoalkali metal orthophosphate and a dialkali metal orthophosphate.
Claim 3
Dependent Claim
13 words
The process of claim 3 wherein said starch material is a bleached starch.
Claim 4
Dependent Claim
62 words
The process of claim 4 wherein the concentration of said alkali metal orthophosphate buffering agent is in the range of from about 0.05 percent to about 1 percent by weight of said starch material, dry substance basis, and the weight ratio of said monoalkali metal orthophosphate to said dialkali metal orthophosphate is in the range of from about 0.2:1 to about 5:1.
Claim 5
Dependent Claim
13 words
The process of claim 5 wherein said water-insoluble calcium compound is calcium carbonate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |