US3674453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of float glass having an oxidized metal-modified surface
Assignee: Pilkington Group Ltd
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Filing: 1969-08-05
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Granted: 1972-07-04
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Expires: 1989-08-05
Abstract
Abstract DESIRED CHARACTERISTICS, FOR EXAMPLE A DESIRED COLOUR, ARE IMPARTED TO FLOAT GLASS BY THE DISSOLVING OF A METAL OXIDE AS A UNIFORM AND CONTINUOUS SURFACE STRATUM IN A FACE OF THE GLASS BY DIRECTING A METAL COMPOUND IN VAPOUR FORM ON TO THE HOT GLASS SURFACE UNDER OXIDISING CONDITIONS SUCH THAT OXIDATION IS PROMOTED ONLY AT THE GLASS SURFACE RESULTING IN SOLUTION OF METAL OXIDE INTO A SURFACE LAYER OF THE GLASS. D R A W I N G
Inventors
- 👤 David Gordon Loukes
- 👤 Alan Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:03
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/007; C03B; C03B18/00; C03B18/02; C03B18/14; C03C17/00; C03C17/22; C03C17/23; C03C17/245; C23; C23C; C23C16/00; C23C16/44; C23C16/453; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/229; C03C2218/00; C03C2218/10; C03C2218/15; C03C2218/152
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |