# US 9,750,280 B2 · pH-stabilized oral tobacco composition

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- Number: US 9,750,280 B2
- Document ID: US9750280B2
- Status: Granted
- Kind: B2
- Application number: 14/395,321
- Filed: 2013-04-18
- Published: 2015-04-30
- Granted: 2017-09-05
- Earliest claimed: 2012-04-20
- Assignees: JT International SA
- Applicants: JT International S.A.
- Inventors: Rory Parsons
- Web page: https://patentgrep.com/patent/US9750280B2

## CPC

- A24B 13/00: Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff (reconstituted tobacco products A24B3/14)
- A24B 15/10: Chemical features of tobacco products or tobacco substitutes
- A24B 15/28: by chemical substances
- A24B 15/42: by organic and inorganic substances {(A24B15/281 takes precedence)}
- A24B: MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF

## Abstract

Disclosed is a pH-stabilized oral tobacco composition comprising a buffer of at least two pH stabilizing substances comprising potassium carbonate and at least one additional pH stabilizing substance that can maintain a low total drop in pH-value over prolonged time at ambient as well as refrigerated temperature, so that the freshness and shelf life of the oral tobacco composition can be improved.

## Claims

### Claim 1

An oral tobacco composition comprising a buffer of at least two pH stabilizing substances, the buffer comprising potassium carbonate and magnesium trisilicate, wherein the total pH drop at a temperature in the range of 18 to 25° C. after 17 weeks is less than 0.7.

### Claim 2 (depends on 1)

The oral tobacco composition of claim 1, wherein the total pH drop at a temperature of less than 8° C. after 27 weeks is less than 0.7.

### Claim 3 (depends on 1)

The oral tobacco composition of claim 1, wherein the average pH drop rate is less than 0.05 per week over a period of at least 17 weeks at a temperature in the range of 18 to 25° C., and/or wherein the average pH drop rate is less than 0.05 per week over a period of at least 27 weeks at a temperature of less than 8° C.

### Claim 4 (depends on 1)

The oral tobacco composition of claim 1, wherein the stability improvement of the pH in comparison to an oral tobacco composition comprising potassium carbonate alone is at least 35%.

### Claim 5 (depends on 1)

The oral tobacco composition of claim 1, wherein the initial pH of the oral tobacco composition is in the range between 7 and 10.

### Claim 6

A method of preparing a pH stabilized oral tobacco product showing a total pH drop at a temperature in the range of 18 to 25° C. after 17 weeks of less than 0.7, comprising
i) providing an oral tobacco product; and
ii) adding a buffer of at least two pH stabilizing substances, the buffer comprising potassium carbonate and magnesium trisilicate.

### Claim 7 (depends on 6)

The method of claim 6, wherein the potassium carbonate and magnesium trisilicate are added separately or in combination.

### Claim 8 (depends on 6, 7)

The method of claim 6 or 7, wherein the potassium carbonate is added in the form of a solution.

### Claim 9 (depends on 6)

The method of claim 6, wherein the magnesium trisilicate is added as solution or powder.

### Claim 10 (depends on 1, 2, 3, 4, 5)

An oral tobacco product comprising the oral tobacco composition of any one of claims 1 to 5.