# US 11,432,550 B2 · Strengthened glass with biocidal property

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- Number: US 11,432,550 B2
- Document ID: US11432550B2
- Status: Granted
- Kind: B2
- Application number: 16/692,532
- Filed: 2019-11-22
- Published: 2020-03-19
- Granted: 2022-09-06
- Earliest claimed: 2014-11-25
- Assignees: Microban Products Company
- Applicants: Microban Products Company
- Inventors: Alvin Lamar Campbell, Jr.
- Web page: https://patentgrep.com/patent/US11432550B2

## CPC

- A01N 59/16: Heavy metals; Compounds thereof
- 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 biocidal additive formulation comprises a silver containing glass particle, and a combination of at least two metal based compounds. A metal in each of the metal based compounds is selected from the group consisting of silver, copper, zinc, mercury, tin, lead, bismuth, barium, cadmium, chromium, titanium, and a combination thereof. Another biocidal additive formulation comprises a silver containing glass particle, ZnO, and Bi2O3. A glass substrate possessing a durable biocidal property and an article possessing a durable biocidal property are also provided.

## Claims

### Claim 1

A biocidal additive formulation comprising:
a silver containing glass particle, and a combination of at least two metal based compounds, wherein a metal in each of the metal based compounds is selected from the group consisting of a second silver, copper, zinc, mercury, tin, lead, bismuth, barium, cadmium, chromium, titanium, and a combination thereof,
wherein the silver containing glass particle is present in the biocidal additive formulation of the present invention in an amount of 0.5% to 2.5% by weight, wherein the weight percentage is based on a dry weight basis of the biocidal additive formulation.

### Claim 2 (depends on 1)

The biocidal additive formulation according to claim 1, wherein the metal of each of the inorganic metal based compounds is selected from the group consisting of silver, zinc, bismuth, and a combination thereof.

### Claim 3 (depends on 1)

The biocidal additive formulation according to claim 1, wherein the silver containing glass particle is a silver salt or a silver-based ion exchange compound.

### Claim 4

A biocidal additive formulation comprising:
a silver containing glass particle,
ZnO, and
Bi2O3
wherein Bi2O3 is present in an amount of 25% to 85% by weight based on the dry weight of the formulation.

### Claim 5 (depends on 4)

The biocidal additive formulation according to claim 4, wherein the silver containing glass particle is present in a range of 0.5% to 2.5%, based on the weight of the biocidal additive formulation.

### Claim 6 (depends on 4)

The biocidal additive formulation according to claim 4, wherein ZnO is in a weight ratio to Bi2O3 in a range of 1:2 to 1:3.

### Claim 7 (depends on 4)

The biocidal additive formulation according to claim 4, wherein ZnO is in a weight ratio to Bi2O3 in a range of 2:1 to 3:1.

### Claim 8 (depends on 4)

The biocidal additive formulation according to claim 4, wherein ZnO is present in an amount of 5% to 85% by weight based on the dry weight of the formulation.

### Claim 9 (depends on 8)

The biocidal additive formulation according to claim 8, wherein ZnO is present in an amount of 10% to 35% by weight based on the dry weight of the formulation.