US3875763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of strengthening glass containers
Assignee: OI Glass Inc
•
Filing: 1973-03-12
•
Granted: 1975-04-08
•
Expires: 1993-03-12
Abstract
Abstract A glass container is provided with a compressive stress layer at its exterior surface by the replacement of sodium ions in the glass surface with potassium ions of larger atomic diameter and the container is then provided with a plastic enveloping sheath of a thickness of 0.003 inch up to about 0.010 to provide a shock resistant, shard-retaining envelope for the container where said sheath is applied while said container is at temperature of approximately 300.degree.F to 600.degree.F.
Inventors
- 👤 Herbert C Snyder
- 👤 Louis V Mancuso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:21
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C03C21/00; C03C21/001; C03C21/002; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
THE METHOD OF PRODUCING A STRENGTHENED SODA-LINE GLASS CONTAINER COMPRISING REPLACING ALKALI-METAL IONS IN AN EXTERIOR SURFACE THEREOF WITH LARGE ALKALI-METAL IONS WITH THE GLASS AT AN ELEVATED TEMPERATURE BELOW THE STRAIN POINT THEREOF TO PRODUCE A COMPRESSION LAYER OF GLASS AT SUCH SURFACE, AND SUBSEQUENTLY FORMING ON SAID SURFACE A SYNTHETIC RESIN COATING OF A THICKNESS OF AT LEAST 0.003 INCH UP TO ABOUT 0.010 INCH TO PROVIDE A PROTECTIVE, SHOCK-RESISTING, SHARD-RETAINING ENCAPSULATING SHEATH, FOR SAID CONTINER, SAID SYNTHETIC RESIN COATING BEING APPLYING WITH SSAID CONTAINER AT AN ELEVATED TEMPERATURE BETEEN APPROXIMATELY 300* AND 600*F.
Claim 2
Independent Claim
96 words
THE METHOD OF PRODUCING A STRENGTHENED SODA-LINE GLASS CONTAINER COMPRISING REPLACING ALKALI-METAL IONS IN AN EXTERIOR SURFACE THEREOF WITH LARGE ALKALI-METAL IONS WITH THE GLASS AT AN ELEVATED TEMPERATURE BELOW THE STRAIN POINT THEREOF TO PRODUCE A COMPRESSION LAYER OF GLASS AT SUCH SURFACE, AND SUBSEQUENTLY FORMING ON SAID SURFACE A SYNTHETIC RESIN COATING OF A THICKNESS OF AT LEAST 0.003 INCH UP TO ABOUT 0.010 INCH TO PROVIDE A PROTECTIVE, SHOCK-RESISTING, SHARD-RETAINING ENCAPSULATING SHEATH, FOR SAID CONTINER, SAID SYNTHETIC RESIN COATING BEING APPLYING WITH SSAID CONTAINER AT AN ELEVATED TEMPERATURE BETEEN APPROXIMATELY 300* AND 600*F.
Claim 3
Dependent Claim
41 words
The method of claim 1 wherein said coating is formed by maintaining the container at an elevated temperature of approximately 600.degree. F. and spraying powdered thermoplastic synthetic resin particles upon said glass container surface by means of an electrostatic spray gun.
Claim 4
Dependent Claim
36 words
The method of claim 1 wherein said coating is formed by maintaining the container at an elevated temperature of approximately 600.degree. F. and passing the same through a fluidized bed of synthetic resin in powdered form.
Claim 5
Dependent Claim
14 words
The method according to claim 1 wherein the synthetic resin comprises an ionomer resin.
Claim 6
Dependent Claim
14 words
The method according to claim 1 wherein the synthetic resin comprises cellulose acetate butyrate.
References Cited (Backward Citations)
US3305812A
Cited
US3253975A
Cited
US3475150A
Cited
US3464807A
Cited
US3743491A
Cited
US3713867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |