US3650720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decorating glass-ceramic articles
Assignee: Corning Glass Works
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Filing: 1969-11-14
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Granted: 1972-03-21
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Expires: 1989-11-14
Abstract
Abstract This invention relates to the decorating of Li2O and/or Na2Ocontaining glass-ceramic articles through the stain coloring thereof utilizing copper and/or silver ions, these articles being subsequently chemically strengthened through an ion exchange reaction of the large-ion-for-small-ion type carried out in a bath of molten salt. More specifically, the present invention is concerned with the prevention of unsightly defects which can occur in the stain coloring during the chemical strengthening process. This is accomplished by passing sulfur dioxide gas through the bath of molten salt.
Inventors
- 👤 Peter Grego
- 👤 Theodore R Kozlowski
- 👤 Peter M Schuyler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:39
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2701215A
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US3313644A
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US3231456A
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US3468745A
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US3287201A
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US3464806A
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US3495963A
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US3441399A
Cited
US3498775A
Cited
US3528847A
Cited
US3529946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |