Patent US4925681A successfully refreshed from Google Patents.
US4925681A
Expired / Lapsed
US
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Process for inhibiting lipid oxidation in food and composition thereby
Assignee: Nestec SA
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Filing: 1989-05-04
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Granted: 1990-05-15
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Expires: 2009-05-04
Abstract
Abstract Antioxidant activity of aqueous extracts of black tea leaves for incorporation into foods susceptible to lipid oxidation is increased by treating the extracts with tannase. Incorporation of ascorbic acid with the treated extracts in foods susceptible to lipid oxidation further increases the antioxidant activity.
Inventors
- 👤 Jimbin Mai
- 👤 Laura J. Chambers
- 👤 Richard E. McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:02
CPC Classifications
C; C11; C11B; C11B5/00; C11B5/0085; A; A23; A23B; A23B2/00; A23B2/70; A23B2/725; A23B2/729; A23F; A23F3/00; A23F3/16; A23F3/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
A process for inhibiting lipid oxidation in a food susceptible to lipid oxidation comprising: treating an aqueous extract of black tea with tannase; and incorporating the treated extract in a food susceptible to lipid oxidation.
Claim 2
Dependent Claim
35 words
A process for inhibiting lipid oxidation in a food susceptible to lipid oxidation comprising: treating an aqueous extract of black tea with tannase; and incorporating the treated extract in a food susceptible to lipid oxidation.
Claim 3
Dependent Claim
44 words
A process according to claim 1 wherein the treatment is carried out at a pH of from 4.0 to 5.5 with the tannase being in an amount of from 0.02% to 1.0% by weight based upon the weight of tea solids in the extract.
Claim 4
Dependent Claim
20 words
A process according to claim 2 wherein the tannase is in an amount of from 0.05% to 0.5% by weight.
Claim 5
Dependent Claim
18 words
A process according to claim 1 further comprising incorporating ascorbic acid with the treated extract in the food.
Claim 6
Dependent Claim
21 words
A composition comprising a food subject to lipid oxidation having incorporated therein a tannase treated aqueous extract of black tea leaves.
Claim 7
Dependent Claim
21 words
A composition comprising a food subject to lipid oxidation having incorporated therein a tannase treated aqueous extract of black tea leaves.
Claim 8
Dependent Claim
10 words
A composition according to claim 5 further comprising ascorbic acid.
References Cited (Backward Citations)
US699979A
Cited
US2768084A
Cited
US2772169A
Cited
US3207666A
Cited
US3451823A
Cited
GB1249932A
Cited
US3959497A
Cited
US3812266A
Cited
US4051264A
Cited
US4472441A
Cited
US4639375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |