Patent US4175958A successfully refreshed from Google Patents.
Patent US4552769A successfully refreshed from Google Patents.
US4552769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cold soluble tea
Assignee: Nestec SA
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Filing: 1985-04-01
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Granted: 1985-11-12
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Expires: 2005-04-01
Abstract
Abstract A process for preparing a powdered tea extract characterized in that black tea leaves are extracted with hot water to give a first extract which is separated from the tea leaves, concentrated to a solids content of from 5% to 12.5%, and then cooled to a temperature from 5° C. to 15° C. to form an insoluble cream which is separated from the concentrated first extract and then extracted with water at a temperature of from 40° C. to 70° C. to give a second extract which is separated from the remaining insoluble cream, after which the first and second extracts are mixed and dried.
Inventors
- 👤 Tito L. Lunder
- 👤 Corine M. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:06
CPC Classifications
A; A23; A23F; A23F3/00; A23F3/16; A23F3/18; A23F3/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A process for preparing a powdered tea extract characterised in that black tea leaves are extracted with hot-water to give a first extract which is separated from the tea leaves, concentrated to a solids content of from 5% to 12.5%, and then cooled to a temperature from 5° C. to 15° C. to form an insoluble cream which is separated from the concentrated first extract and then extracted with water at a temperature of from 40° C. to 70° C. to give a second extract which is separated from the remaining insoluble cream, after which the first and second extracts are mixed and dried.
Claim 2
Dependent Claim
104 words
A process for preparing a powdered tea extract characterised in that black tea leaves are extracted with hot-water to give a first extract which is separated from the tea leaves, concentrated to a solids content of from 5% to 12.5%, and then cooled to a temperature from 5° C. to 15° C. to form an insoluble cream which is separated from the concentrated first extract and then extracted with water at a temperature of from 40° C. to 70° C. to give a second extract which is separated from the remaining insoluble cream, after which the first and second extracts are mixed and dried.
Claim 3
Dependent Claim
32 words
A process according to claim 1 characterised in that the amount of water used for each extraction is from 5 to 12 parts by weight per part by weight of solid matter.
Claim 4
Dependent Claim
26 words
A process according to claim 1 characterised in that the temperature used for the extraction of the tea leaves is from 85° C. to 110° C.
Claim 5
Dependent Claim
24 words
A process according to claim 1 characterised in that temperature of the extraction of the tea cream is from 45° C. to 65° C.
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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |