# US 12,180,115 B1 · Yellow soda-lime-silica glass

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- Number: US 12,180,115 B1
- Document ID: US12180115B1
- Status: Granted
- Kind: B1
- Application number: 17/466,066
- Filed: 2021-09-03
- Granted: 2024-12-31
- Earliest claimed: 2021-09-03
- Assignees: Owens-Brockway Glass Container Inc.
- Applicants: Owens-Brockway Glass Container Inc.
- Inventors: Scott Cooper; Casey Townsend; Chase Davis
- Web page: https://patentgrep.com/patent/US12180115B1

## CPC

- C03C 3/087: containing calcium oxide, e.g. common sheet or container glass
- C03B 9/30: Details of blowing glass (for blowing with the mouth C03B9/02); Use of materials for the moulds
- C03B 25/00: Annealing glass products
- C03B 25/02: in a discontinuous way
- C03B 25/06: with horizontal displacement of the glass products
- C03C 4/02: for coloured glass
- Y10T 428/131: Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A soda-lime-silica glass that has a composition comprising 60-80 wt % SiO2; 8-18 wt % Na2O; 5-15 wt % CaO; 0-3 wt % Al2O3; 0.0010-0.050 wt % silver expressed as Ag2O; and 0.005-0.30 wt % bismuth expressed as Bi2O3 is disclosed. Light-scattering silver colloids are dispersed throughout the soda-lime-silica glass to provide the glass with a yellow coloration. The soda-lime-silica glass may be in the form of a body that provides a shape of a container that defines an internal containment space. The body of such a container includes a base, a mouth that defines an opening to the internal containment space, and a wall that externs from the base to the mouth. A method of making a glass container that exhibits a yellow coloration is also disclosed.

## Claims

### Claim 1

A glass container comprising:
a soda-lime-silica glass in the form of a body that provides a shape of the container and defines an internal containment space, the body of the container including a base, a mouth that defines an opening to the internal containment space, and a wall that extends from a perimeter of the base to the mouth, the soda-lime-silica glass having a composition that comprises 60-80 wt % SiO2; 8-18 wt % Na2O; 5-15 wt % CaO; 0-3 wt % Al2O3; 0.0010-0.050 wt % silver expressed as Ag2O; and 0.005-0.30 wt % bismuth expressed as Bi2O3; and wherein light-scattering silver colloids are dispersed throughout the soda-lime-silica glass to provide the glass with a yellow coloration.

### Claim 2 (depends on 1)

The glass container set forth in claim 1, wherein the composition of the soda-lime-silica glass further comprises at least one of 0-0.4 wt % tin expressed as SnO; 0-0.15 wt % iron expressed as Fe2O3; 0-0.2 wt % sulfur expressed as SO3; or combinations thereof.

### Claim 3 (depends on 2)

The glass container set forth in claim 2, wherein the composition of the soda-lime-silica glass comprises at least one of 0.05-0.20 wt % tin expressed as SnO; 0.01-0.10 wt % iron expressed as Fe2O3; 0.005-0.03 wt % sulfur expressed as SO3; or combinations thereof.

### Claim 4 (depends on 1)

The glass container set forth in claim 1, wherein the composition of the soda-lime-silica glass comprises 0.0025-0.0050 wt % silver expressed as Ag2O and 0.01-0.16 wt % bismuth expressed as Bi2O3.

### Claim 5 (depends on 4)

The glass container set forth in claim 4, wherein the composition of the soda-lime-silica glass further comprises 0.05-0.20 wt % tin expressed as SnO; 0.01-0.10 wt % iron expressed as Fe2O3; and 0.005-0.03 wt % sulfur expressed as SO3.

### Claim 6 (depends on 1)

The glass container set forth in claim 1, wherein the composition of the soda-lime-silica glass is free of cadmium and lead.

### Claim 7

A glass container comprising:
a body of soda-lime-silica glass that provides a shape of the glass container about a central longitudinal axis and defines an internal containment space, the body of soda-lime-silica glass including a base, a mouth that defines an opening to the internal containment space, and a wall that extends from a perimeter of the base along the longitudinal axis of the container to the mouth; the body of soda-lime-silica glass having a composition comprising 60-80 wt % SiO2; 8-18 wt % Na2O; 5-15 wt % CaO; 0-3 wt % Al2O3; 0.0010-0.050 wt % silver expressed as Ag2O; and 0.005-0.30 wt % bismuth expressed as Bi2O3; and wherein light-scattering silver colloids are dispersed throughout the body of soda-lime-silica glass to provide the glass with a yellow coloration.

### Claim 8 (depends on 7)

The glass container set forth in claim 7, wherein the composition of the body of soda-lime-silica glass further comprises at least one of 0-0.4 wt % tin expressed as SnO; 0-0.15 wt % iron expressed as Fe2O3; 0-0.2 wt % sulfur expressed as SO3; or combinations thereof.

### Claim 9 (depends on 8)

The glass container set forth in claim 8, wherein the composition of the body of soda-lime-silica glass comprises at least one of 0.05-0.20 wt % tin expressed as SnO; 0.01-0.10 wt % iron expressed as Fe2O3; 0.005-0.03 wt % sulfur expressed as SO3; or combinations thereof.

### Claim 10 (depends on 7)

The glass container set forth in claim 7, wherein the composition of the body of the soda-lime-silica glass comprises 0.0025-0.0050 wt % silver expressed as Ag2O and 0.01-0.16 wt % bismuth expressed as Bi2O3.

### Claim 11 (depends on 10)

The glass container set forth in claim 10, wherein the composition of the body of soda-lime-silica glass comprises 0.05-0.20 wt % tin expressed as SnO; 0.01-0.10 wt % iron expressed as Fe2O3; and 0.005-0.03 wt % sulfur expressed as SO3.

### Claim 12 (depends on 7)

The glass container set forth in claim 7, wherein the composition of the body of soda-lime-silica glass is free from cadmium and lead.

### Claim 13

A method of making a glass container, the method comprising the steps of:
producing a melt of soda-lime-silica glass having a composition comprising 60-80 wt % SiO2; 8-18 wt % Na2O; 5-15 wt % CaO; 0-3 wt % Al2O3; 0.0010-0.050 wt % silver expressed as Ag2O; and 0.005-0.30 wt % bismuth expressed as Bi2O3;
forming a glass container from the melt of soda-lime-silica glass, the glass container including a body that provides a shape of the glass container and which is comprised of the soda-lime-silica glass, wherein light-scattering silver colloids are dispersed throughout the body to provide the glass with a yellow coloration, and wherein the body defines an internal containment space and includes a base, a mouth that defines an opening to the internal containment space, and a wall that extends from a perimeter of the base to the mouth;
annealing the glass container by heating the body of soda-lime-silica glass to a temperature above an annealing point of the soda-lime-silica glass followed by cooling the glass container to a temperature below the strain point of the soda-lime-silica glass.

### Claim 14 (depends on 13)

The method set forth in claim 13, further comprising:
striking the glass container, after annealing, by heating the body of soda-lime-silica glass to a temperature above the temperature reached during annealing for a period of time and then cooling the body of soda-lime-silica glass to intensify the yellow coloration provided by the glass.

### Claim 15 (depends on 14)

The method as set forth in claim 14, wherein, during striking, the body of the soda-lime-silica glass is heated to a temperature ranging from 575° C. to 670° C. for a period of time ranging from 15 minutes to 45 minutes.

### Claim 16 (depends on 13)

The method set forth in claim 13, wherein the composition of the soda-lime-silica glass comprises at least one of 0.05-0.20 wt % tin expressed as SnO; 0.01-0.10 wt % iron expressed as Fe2O3; 0.005-0.03 wt % sulfur expressed as SO3; or combinations thereof.