# US 9,433,187 B2 · Animal litter, process for preparing animal litter and method of removal of animal waste

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- Number: US 9,433,187 B2
- Document ID: US9433187B2
- Status: Granted
- Kind: B2
- Application number: 14/959,816
- Filed: 2015-12-04
- Published: 2016-03-24
- Granted: 2016-09-06
- Earliest claimed: 2012-02-20
- Assignees: Kent Pet Group, Inc.
- Applicants: Kent Pet Group, Inc.
- Inventors: Lin Wang; Thomas A. Wiesner
- Web page: https://patentgrep.com/patent/US9433187B2

## CPC

- A01K 1/0155: {comprising organic material}
- A01K 1/0107: {Cat trays; Dog urinals; Toilets for pets}
- A01K 1/011: {with means for removing excrement (A01K1/0114 and A01K1/0117 take precedence)}
- A01K 1/0154: {comprising inorganic material}
- B01J 20/22: comprising organic material
- B01J 20/24: Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
- B01J 20/28016: {Particle form}
- A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

An animal litter, process for preparing the animal litter and a method for removal of animal waste using the animal litter are provided. The animal litter generally includes at least about 10 weight % finely ground pine wood powder. Further the animal litter includes a lubricant and a cohesiveness agent. The animal litter is in the form of discrete plural particles which tend to agglomerate when wetted.

## Claims

### Claim 1

A method for removal of animal waste, comprising:
providing a container including an animal litter, said animal litter comprising:
a sorbent comprising at least about 10 weight % finely ground pine wood powder, wherein no more than about 0.5% of the pine wood powder particles are larger than U.S. standard #10 mesh screen size, no more than 30% of the pine wood powder particles are larger than U.S. standard #20 mesh screen size, and at least 20% of the pine wood powder particles are smaller than U.S. standard #20 mesh screen size;
a lubricant; and
a cohesiveness agent, said cohesiveness agent comprising a starch;
said animal litter being in the form of discrete plural compacted particles which tend to agglomerate when wetted,
said cohesiveness agent being present in said litter in an amount effective to enhance the intraparticle cohesion of said particles,
allowing an animal to excrete waste into said litter, whereby liquid present in said container as a result of said waste causes at least a portion of said litter to agglomerate into at least one clump; and
removing said clump from said container.

### Claim 2 (depends on 1)

The method of claim 1 wherein the pine wood powder is configured to pass through a 20 mesh screen.

### Claim 3 (depends on 1)

The method of claim 1 wherein the lubricant is selected from the group consisting of corn germ, virgin corn germ, fats, oils and mixtures thereof.

### Claim 4 (depends on 1)

The method of claim 1 wherein the cohesiveness agent is corn starch.

### Claim 5 (depends on 1)

The method of claim 1 wherein the mixture further comprises a mold inhibitor selected from the group consisting of citric acid, potassium sorbate and mixtures thereof.

### Claim 6 (depends on 1)

The method of claim 1 wherein the mixture includes at least about 40 weight % pine wood powder.