Patent US4810839A successfully refreshed from Google Patents.
Patent US4357361A successfully refreshed from Google Patents.
US4357361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold soluble tea
Assignee: Nestec SA
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Filing: 1981-06-11
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Granted: 1982-11-02
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Expires: 2001-06-11
Abstract
Abstract A process for the preparation of a powdered black tea extract which comprises contacting black tea leaves with water which has previously been infused at ambient temperature with another vegetable material, maintaining at ambient temperature for a time sufficient to achieve good contact of the tea leaves with the water, heating to a temperature of at least 60° C., afterwards separating the aqueous extract from the solid material and finally drying the aqueous extract.
Inventors
- 👤 Tito L. Lunder
- 👤 Corine M. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:17
CPC Classifications
A; A23; A23F; A23F3/00; A23F3/34; A23F3/16; A23F3/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A process for the preparation of a powdered black tea extract which is readily and completely soluble in cold water which comprises: (a) contacting herb tea selected from the group consisting of Hibiscus flowers, Rosehips, Peppermint and Orange blossoms with water at ambient temperature for a period of at least 5 minutes to form an infusion; (b) separating the infusion from the herb tea; (c) adding the herb tea infusion to black tea leaves at ambient temperature for a period of time sufficient to achieve good contact of the tea leaves with the water to form an aqueous tea extract/tea leaf mixture; (d) heating the mixture to a temperature of at least 60° C.; (e) separating the aqueous tea extract from the extracted black tea leaves; and then (f) drying the aqueous extract; wherein the amount of herb tea employed in step (a) is from 5 to 35% by weight based on the weight of black tea employed in step (c).
Claim 2
Dependent Claim
161 words
A process for the preparation of a powdered black tea extract which is readily and completely soluble in cold water which comprises: (a) contacting herb tea selected from the group consisting of Hibiscus flowers, Rosehips, Peppermint and Orange blossoms with water at ambient temperature for a period of at least 5 minutes to form an infusion; (b) separating the infusion from the herb tea; (c) adding the herb tea infusion to black tea leaves at ambient temperature for a period of time sufficient to achieve good contact of the tea leaves with the water to form an aqueous tea extract/tea leaf mixture; (d) heating the mixture to a temperature of at least 60° C.; (e) separating the aqueous tea extract from the extracted black tea leaves; and then (f) drying the aqueous extract; wherein the amount of herb tea employed in step (a) is from 5 to 35% by weight based on the weight of black tea employed in step (c).
Claim 3
Dependent Claim
33 words
A process according to claim 1 in which the amount of herb tea employed is from 10% to 30% by weight based on the weight of the black tea used for the extraction.
Claim 4
Dependent Claim
28 words
A process according to claim 1 in which the period of time for the infusion of the herb tea into the water is from 10 to 40 minutes.
Claim 5
Dependent Claim
32 words
A process according to claim 1 in which the black tea leaves are in contact with the herb tea infusion at ambient temperature for a period of from 10 to 40 minutes.
Claim 6
Dependent Claim
27 words
A process according to claim 1 in which the black tea leaves and infused water are heated to a temperature of from 90° C. to 100° C.
Claim 7
Dependent Claim
34 words
A process according to claim 1 in which the black tea leaves and infused water are maintained at the temperature of at least 60° C. for a period of from 2.5 to 7.5 minutes.
Claim 8
Dependent Claim
13 words
A powdered black tea extract prepared by a process according to claim 1.
References Cited (Backward Citations)
US2785979A
Cited
US4154864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |