# US 11,076,636 B2 · Insertable filter unit

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- Number: US 11,076,636 B2
- Document ID: US11076636B2
- Status: Granted
- Kind: B2
- Application number: 14/440,226
- Filed: 2013-12-19
- Published: 2015-11-05
- Granted: 2021-08-03
- Earliest claimed: 2012-12-21
- Assignees: Nicoventures Trading Limited
- Applicants: British American Tobacco (Investments) Limited
- Inventors: Aaron Brookbank; Richard Young
- Web page: https://patentgrep.com/patent/US11076636B2

## CPC

- A24D 3/04: Tobacco smoke filters characterised by their shape or structure
- A24D 3/0291: {for hollow tipped filters, e.g. recess filters}
- A24D 3/048: {containing additives}
- A24D: CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES

## Abstract

An insertable filter unit for insertion into a smoking article filter having a recess, wherein the insertable filter unit comprises an outer casing defining a cavity for storing a smoke modifying agent, and wherein the insertable filter unit is arranged to be inserted into the recess of the smoking article filter by a user.

## Claims

### Claim 1

A kit comprising:
a smoking article having a recess, into which an insertable filter unit is insertable; and
an insertable filter unit for insertion into the recess of the smoking article, the insertable filter unit comprising:
a tobacco industry product; and
an outer casing defining a cavity, the cavity storing the tobacco industry product, the outer casing including a plurality of apertures therein, the apertures configured to allow aerosol to travel into and through the insertable filter unit in a generally axial direction from a distal end of the insertable filter unit to a buccal end of the insertable filter unit, wherein at least one aperture of the plurality of apertures is disposed in the distal end of the insertable filter unit,
the insertable filter unit configured to be inserted into the recess of the smoking article by a user and comprising a central portion and end portions either side of the central portion, the diameter of the end portions being smaller than the diameter of the central portion.

### Claim 2 (depends on 1)

The kit according to claim 1, wherein the plurality of apertures comprises a first plurality of apertures defined in the distal end of the insertable filter unit and a second plurality of apertures defined in the buccal end of the insertable filter unit.

### Claim 3 (depends on 1)

The kit according to claim 1, the insertable filter unit shaped to facilitate insertion of the insertable filter unit into the recess.

### Claim 4 (depends on 1)

The kit according to claim 1, the insertable filter unit shaped to facilitate retention of the insertable filter unit in the recess.

### Claim 5

A smoking article for producing aerosol for inhalation by a user, the smoking article comprising an insertable filter unit inserted in a recess thereof, the insertable filter unit comprising:
a a tobacco industry product; and
an outer casing defining a cavity, the cavity storing the tobacco industry product, the outer casing including a plurality of apertures therein, the apertures configured to allow aerosol to travel into and through the insertable filter unit in a generally axial direction from a distal end of the insertable filter unit to a buccal end of the insertable filter unit, wherein at least one aperture of the plurality of apertures is disposed in the distal end of the insertable filter unit,
the insertable filter unit configured to be inserted into the recess of the smoking article by a user and comprising a central portion and end portions either side of the central portion, the diameter of the end portions being smaller than the diameter of the central portion.

### Claim 6 (depends on 5)

The smoking article according to claim 5, wherein the insertable filter unit is configured to provide a sensory indication indicative of insertion of the insertable filter unit into the recess of the smoking article.

### Claim 7 (depends on 1)

The kit according to claim 1, wherein the insertable filter unit is configured to provide a sensory indication indicative of insertion of the insertable filter unit into the recess of the smoking article.

### Claim 8 (depends on 1)

The kit according to claim 1, wherein the outer casing comprises two mutually engageable parts that, when engaged, define the cavity.

### Claim 9 (depends on 8)

The kit according to claim 8, wherein the two mutually engageable parts are configured to provide a first sensory indication when the two mutually engageable parts are engaged.

### Claim 10 (depends on 9)

The kit according to claim 9, wherein the sensory indication is an audible indication.

### Claim 11 (depends on 1)

The smoking article according to claim 1, comprising a cigarette.

### Claim 12 (depends on 11)

The smoking article according to claim 11, wherein the cigarette is a combustible product.