# US 5,407,920 A · Treatment of wood and timber with pesticidal formulations

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,407,920 A
- Document ID: US5407920A
- Status: Granted
- Kind: A
- Application number: 08/111,907
- Filed: 1993-08-26
- Granted: 1995-04-18
- Earliest claimed: 1988-09-30
- Assignees: NC Development, Inc.
- Inventors: Howard B. Dawson
- Web page: https://patentgrep.com/patent/US5407920A

## CPC

- A01N 25/04: Dispersions, {emulsions, suspoemulsions, suspension concentrates} or gels (foams A01N25/16)
- A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS

## Abstract

A method of treating wood and timber is disclosed. Wood or timber is treated with a pesticidal microemulsion or other water-miscible formulation that has an average particle size of at most 200 nm. The treatment is particularly effective in protecting wood and timber against the common furniture beetle (Anobium punctatum), the house longhorn (Hylotrupes bajulus), the death watch beetle (Xestobium rufovillorum), dry rot (Serpula (merulius) lacrymans) and wet rot (Coniophora puteena).

## Claims

### Claim 1

A method of treating wood or timber, the method comprising applying to the wood or timber a pesticidal water-miscible formulation whose average particle size is at most 200 nm.

### Claim 2 (depends on 1)

A method as claimed in claim 1, wherein the method is a method of controlling at least one pest selected from the group consisting of the common furniture beetle (Anobium punctatum), the house longhorn (Hylotrupes bajulus) and the death watch beetle (Xestobium rufovillorum).

### Claim 3 (depends on 1)

A method as claimed in claim 1, wherein the method is a method of controlling at least one of dry rot (Serpula (merulius) lacrymans) and wet rot (Coniophora puteena).

### Claim 4 (depends on 3)

A method as claimed in claim 3, wherein the formulation comprises water, a pesticidal oil, a surfactant and a cosurfactant.

### Claim 5 (depends on 4)

A method as claimed in claim 4, wherein the pesticidal oil consists substantially only of a pesticide.

### Claim 6 (depends on 4)

A method as claimed in claim 4, wherein the cosurfactant has an HLB of less than 12.

### Claim 7 (depends on 1)

A method as claimed in claim 1, wherein the surfactant comprises an anionic surfactant.

### Claim 8 (depends on 1)

A method as claimed in claim 1, wherein the cosurfactant comprises a nonionic surfactant or an aliphatic alcohol.

### Claim 9 (depends on 1)

A method as claimed in claim 1, wherein the formulation comprises on a w/v basis: oil (20 to 50%), surfactant (1 to 20%), cosurfactant (1 to 20%) and water (20 to 70%), provided that the total number of percentage parts of the ingredients cannot exceed 100.

### Claim 10 (depends on 1)

A method as claimed in claim 1, wherein the formulation comprises on a w/v basis: oil (1 to 20%), surfactant (1 to 10%), cosurfactant (1 to 10%) and water (40 to 95%), provided that the total number of percentage parts of the ingredients cannot exceed 100.

### Claim 11 (depends on 4)

A method as claimed in claim 4, wherein the cosurfactant comprises a nonionic surfactant.

### Claim 12 (depends on 4)

A method as claimed in claim 4, wherein the cosurfactant is oil-soluble.

### Claim 13 (depends on 4)

A method as claimed in claim 4, wherein the pesticide is a pyrethroid.

### Claim 14 (depends on 1)

A method as claimed in claim 1, wherein the formulation is a microemulsion.

### Claim 15 (depends on 1)

A method as claimed in claim 1, wherein the formulation is an oil-in-water microemulsion, a micellar solution or a molecular solution.

### Claim 16 (depends on 14)

A method as claimed in claim 14, wherein the microemulsion is a water-in-oil microemulsion.

### Claim 17 (depends on 16)

A method as claimed in claim 16, wherein the cosurfactant has an HLB of 4 to 9.

### Claim 18 (depends on 15)

A method as claimed in claim 15, wherein the formulation is an oil-in-water microemulsion and the cosurfactant has an HLB of 9 to 20.

### Claim 19 (depends on 4)

A method as claimed in claim 4, wherein the cosurfactant comprises an aliphatic alcohol.