# US 5,707,553 A · Anti-corrosion, quick drying distilled water solution for autoclave sterilizers

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- Number: US 5,707,553 A
- Document ID: US5707553A
- Status: Granted
- Kind: A
- Application number: 08/506,478
- Filed: 1995-07-25
- Granted: 1998-01-13
- Earliest claimed: 1994-02-25
- Inventors: Melvyn Lloyd Sawyer; Lennart Goof
- Web page: https://patentgrep.com/patent/US5707553A

## CPC

- C23F 11/141: {Amines; Quaternary ammonium compounds}
- C23F: NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE (working metal by laser beams B23K26/00; desurfacing by applying flames B23K7/00; working of metal by electro-erosion B23H; producing decorative effects by removing surface material, e.g. by engraving, by etching, B44C1/22; electrolytic etching or polishing C25F); INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25

## Abstract

A non-toxic solution to be used in the place of distilled or de-ionized water in autoclave sterilizers is disclosed. The solution renders the instruments placed in such sterilizers free of rust, spotting, and hastens the drying time of such instruments.

## Claims

### Claim 1

A non-toxic liquid composition for autoclaves used for sterilizing and quick drying of previously cleaned medical instruments consisting essentially of:
(a) about 0.05% to about 0.15% volume of a non-filming alicyclic amine anti-corrosion agent which is soluble in water and does not degrade between a temperature range of about 20.degree. C. to about 150.degree. C.;
(b) about 0.05% to about 0.15% volume of block co-polymer anti-spotting quick-drying surfactant which is soluble in water and does not degrade between a temperature range of about 5.degree. C. to about 150.degree. C.; and
(c) about 99.7% to about 99.9% volume of purified water treated to remove dissolved minerals and impurities;
said liquid composition when used in a sterilizing autoclave within a temperature range of 20.degree. C. to 135.degree. C. preventing corrosion and spotting and promoting quick drying of prior cleaned medical instruments sterilized in said autoclave.

### Claim 2 (depends on 1)

A composition as claimed in claim 1 wherein the alicyclic amine is cyclohexylamine at a concentration of about 0.1% volume and the block co-polymer surfactant is polyoxypropylene-polyoxyethylene block co-polymer at a concentration of about 0.1% volume, and the purified water is distilled water of about 99.8% volume.

### Claim 3

A non-toxic liquid composition for autoclaves used for sterilization and quick drying of previously cleaned medical instruments consisting essentially of:
(a) about 0.05% to about 0.15% volume of an anti-corrosion agent consisting essentially of a non-toxic concentration of alicyclic amine which is soluble in water and does not degrade between a temperature range from about 0.degree. C. to about 150.degree. C.;
(b) about 0.05% to about 0.15% volume of an anti-spotting quick-drying agent consisting essentially of a non-toxic concentration of polyoxypropylene-polyoxyethylene block co-polymer surfactant which is soluble in water and does not degrade between a temperature range from about 0.degree. C. to about 150.degree. C.; and
(c) the remainder consisting essentially of distilled water; said liquid composition when used in an autoclave within the specified temperature range preventing corrosion and spotting and promoting quick-drying of prior cleaned medical instruments sterilized in said autoclave.

### Claim 4 (depends on 3)

A composition as claimed in claim 3 wherein the anti-corrosion agent is cyclohexylamine.