Patent US3989864A successfully refreshed from Google Patents.
US3989864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for applying abrasion resistant phosphate coating to glass container
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-04-07
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Granted: 1976-11-02
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Expires: 1995-04-07
Abstract
Abstract A process for providing an abrasion resistant coating on the surface of a glass container by treating the container with a solution containing 0.5 to 10% by weight of phosphoric acid and less than 5% by weight of metal phosphate in an aqueous diluent, the temperature of the surface of the container being at least 300° C, and thereafter applying a lubricious organic cold-end coating to the surface of the container.
Inventors
- 👤 David Gordon Hey
- 👤 Kevin Thomas McAloon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; C03C17/25; C03C17/34; C03C17/42; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/228; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/112; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
In a process for treating the surface of a glass container comprising applying a clear and transparent abrasion resistant coating to the surface of the container at an elevated temperature and thereafter applying to the surface of the container a lubricious organic cold-end coating, the improvement which comprises forming the abrasion resistant coating by applying to the surface of the container an aqueous solution of phosphoric acid containing from 0.5% to 10% by weight of phosphoric acid and less than 5% by weight of metal phosphate, the temperature of the surface of the container being at least 300° C.
Claim 2
Dependent Claim
99 words
In a process for treating the surface of a glass container comprising applying a clear and transparent abrasion resistant coating to the surface of the container at an elevated temperature and thereafter applying to the surface of the container a lubricious organic cold-end coating, the improvement which comprises forming the abrasion resistant coating by applying to the surface of the container an aqueous solution of phosphoric acid containing from 0.5% to 10% by weight of phosphoric acid and less than 5% by weight of metal phosphate, the temperature of the surface of the container being at least 300° C.
Claim 3
Dependent Claim
15 words
A process as claimed in claim 1 in which the phosphoric acid comprises orthophosphoric acid.
Claim 4
Dependent Claim
20 words
A process as claimed in claim 1 in which the concentration of phosphoric acid is at least 1% by weight.
Claim 5
Dependent Claim
21 words
A process as claimed in claim 3 in which the concentration of phosphoric acid is not greater than 5% by weight.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 3 in which the concentration of phosphoric acid is in the range 11/2% to 4% by weight.
Claim 7
Dependent Claim
19 words
A process as claimed in claim 1 in which the temperature is in the range 300° to 700° C.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 6 in which the temperature is in the range 450° to 650° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |