PURIFIED GREEN TEA EXTRACT

• US 20100136205A1
• Filed: 05/23/2008
• Published: 06/03/2010
• Est. Priority Date: 05/24/2007
• Status: Active Grant

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Konishi, Tomoko
• Granted Patent: US 8,187,656 B2
• Time in Patent Office: Days
• US Class Current: 426/597
• CPC Class Codes: A23F 3/163 Liquid or semi-liquid tea extract preparations, e.g. gels, liquid extracts in solid capsules
• CPC Class Codes: A23F 3/20 Removing unwanted substances A23F3/166 takes precedence; reducing or removing alkaloid content A23F3/38
• CPC Class Codes: A23F 3/205 Using flocculating or adsorbing agents
• CPC Class Codes: A23L 2/52 Adding ingredients adding preservatives A23L2/44
• CPC Class Codes: A23L 33/105 Plant extracts, their artificial duplicates or their derivatives
• CPC Class Codes: A23L 5/23 by extraction with solvents
• CPC Class Codes: A23L 5/27 by chemical treatment, by adsorption or by absorption

Abstract

A purified green tea extract is improved in bitterness and aftertaste.

The purified green tea extract, which comprises satisfying the following conditions:

• • (1) a ratio of a sum of content weights of (A) myricetin, (B) quercetin and (C) kaempferol to a sum of content weights of (D) epigallocatechin gallate and (E) gallocatechingallate, ((A)+(B)+(C))/((D)+(E)), is from 0.0000001 to 0.010,
  • (2) a sum of content weights of (D) the epigallocatechin gallate and (E) the gallocatechin gallate in non-polymer catechins, ((D)+(E))), is from 0.01 to 29 wt %, and
  • (3) a percentage of gallate body in the non-polymer catechins is from 0.01 to 49 wt %.

Claims

1. A purified green tea extract, which satisfies the following conditions (1), (2) and (3):

(1) a ratio of a sum of content weights of (A) myricetin, (B) quercetin and (C) kaempferol to a sum of content weights of (D) epigallocatechin gallate and (E) gallocatechin gallate, ((A)+(B)+(C))/((D)+(E)), is from 0.0000001 to 0.010;

(2) a sum of content weights of (D) the epigallocatechin gallate and (E) the gallocatechin gallate in non-polymer catechins, ((D)+(E)), is from 0.01 to 29 wt %; and

(3) a percentage of gallate body in the non-polymer catechins is from 0.01 to 49 wt %.

2. The purified green tea extract according to claim 1, wherein a content weight ratio of (F) caffeine to (G) the non-polymer catechins, (F)/(G), is from 0.0001 to 0.25.

3. The purified green tea extract according to claim 1 or 2, wherein a content weight ratio of (G) the non-polymer catechins to (H) total polyphenols, (G)/(H)), is from 0.8 to 1.2.

4. A food comprising the purified green tea extract according to any one of claims 1 to 3.

5. A beverage comprising the purified green tea extract according to any one of claims 1 to 3.

6. The beverage according to claim 5, which is a packaged beverage.