Patent US4052226A successfully refreshed from Google Patents.
US4052226A
Expired / Lapsed
US
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Directed enzymolysis of starch
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1975-09-25
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Granted: 1977-10-04
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Expires: 1995-09-25
Abstract
Abstract Starch hydrolyzates having a desired degree of polymerization are prepared by hydrolyzing derivatized starch esters with amylase and thereafter saponifying the starch ester hydrolyzates to obtain a hydrolyzate product essentially free from substitution. Amylolysis and saccharide distribution of the resultant saponified hydrolyzates are effectively accomplished by pre-selecting a starch ester having the appropriate degree of ester substitution.
Inventors
- 👤 Frank Verbanac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:25
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12; C08B30/18; C08B31/00; C08B31/02; C13; C13K; C13K1/00; C13K1/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
79 words
A method for controlling the saccharide distribution for starch hydrolyzate obtained by the hydrolysis of starch ester with amylase, comprising: a. hydrolyzing a starch ester having a degree of ester substitution from about 0.05 to about 0.5 with an amylase to a starch ester hydrolyzate, b. saponifying the starch ester groups of the starch ester hydrolyzate to the hydroxyl form and thereby provide a saccharide product essentially free from ester groups, and c. recovering the saponfied saccharide product therefrom.
Claim 2
Independent Claim
79 words
A method for controlling the saccharide distribution for starch hydrolyzate obtained by the hydrolysis of starch ester with amylase, comprising: a. hydrolyzing a starch ester having a degree of ester substitution from about 0.05 to about 0.5 with an amylase to a starch ester hydrolyzate, b. saponifying the starch ester groups of the starch ester hydrolyzate to the hydroxyl form and thereby provide a saccharide product essentially free from ester groups, and c. recovering the saponfied saccharide product therefrom.
Claim 3
Dependent Claim
22 words
The method according to claim 1 wherein the degree of substitution of the starch ester ranges from about 0.1 to about 0.3.
Claim 4
Dependent Claim
26 words
The method according to claim 2 wherein the amylase comprises at least one 1,4-alpha-glucosidic hydrolyzing amylase selected from the group consisting of alpha-amylase, beta-amylase and glucoamylase.
Claim 5
Dependent Claim
37 words
The method according to claim 3 wherein the hydrolyzed starch ester is saponified to a saccharide product essentially free from ester groups with a water-soluble, strong metal base at a pH between about 9.0 to about 12.0.
Claim 6
Dependent Claim
16 words
The method according to claim 4 wherein the starch ester consists essentially of a starch acetate.
Claim 7
Dependent Claim
24 words
The method according to claim 1 wherein the starch ester is hydrolyzed to a starch ester hydrolyzate with at least one 1,4-alpha-glucosidic hydrolyzing amylase.
Claim 8
Dependent Claim
27 words
The method according to claim 6 wherein the starch ester is saponified with a water-soluble, strong metal base at a pH between about 9.0 to about 12.0.
Claim 9
Dependent Claim
23 words
The method according to claim 7 wherein the saponified starch hydrolyzate product is neutralized to a pH of about 4.5 to about 6.0.
Claim 10
Dependent Claim
84 words
The method according to claim 7 wherein the degree of substitution for the starch ester ranges from about 0.1 to about 0.3 and the starch ester is hydrolyzed with beta-amylase to a starch hydrolyzate which contains on a total saccharide weight basis at least 80% saccharides of a D.P. 2.0 and D.P. greater than 30 and the weight percent of saccharides having a D.P. greater than 30 is at least equal to or greater than the weight percent of saccharides having a D.P. 2.0.
Claim 11
Dependent Claim
8 words
The saponified saccharide product according to claim 9.
Claim 12
Dependent Claim
70 words
The method according to claim 7 wherein the starch ester D.S. ranges from about 0.1 to 0.3 and the starch ester is hydrolyzed with glucoamylase to a starch ester hydrolyzate having at least 40% by weight dextrose and at least 25% by weight saccharides of a D.P. greater than 30 with the saccharides which have a D.P. greater than 30 comprising the principal saccharides of a D.P. 2.0 and higher.
Claim 13
Dependent Claim
8 words
The saponified saccharide product according to claim 11.
Claim 14
Dependent Claim
73 words
The method according to claim 7 wherein the starch ester D.S. ranges from about 0.1 to about 0.3 and the starch hydrolyzate is hydrolyzed with alpha amylase to a starch ester hydrolyzate containing less than about 2.0% by weight saccharides of a D.P. 1 and 2, less than 15% by weight saccharides of a D.P. 11-30 and at least a major weight portion of the ester hydrolyzates have a D.P. greater than 30.0.
Claim 15
Dependent Claim
8 words
The saponified saccharide product according to claim 13.
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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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |