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US3556757A
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US
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Alkali metal salt bath with alkali metal acetate additive for treatment of glasses and glass-ceramics
Assignee: Corning Glass Works
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Filing: 1968-02-05
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Granted: 1971-01-19
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Expires: 1988-02-05
Abstract
Abstract THIS INVENTION RELATES TO THE STRENGTHENING OF GLASS AND GLASS-CERAMIC ARTICLES THROUGH AN ION EXCHANGE REACTION CARRIED OUT IN A BATH OF MOLTEN SALT. MORE PARTICULARLY, THIS INVENTION RELATES TO A METHOD FOR DECREASING THE AMOUNT OF MOLTEN INORGANIC ALKALI METAL SALT ADHERING TO GLASS AND GLASS-CERMIC ARTICLES UPON REMOVAL FROM THE BATH OF MOLTEN SALT BY THE ADDITION OF ABOUT 0 .5-5% BY WEIGHT OF AN ALKALI SALT OF ACETIC ACID TO A BATH OF THE MOLTEN SALT OPERATING AT ABOUT 300*-450*C.
Inventors
- 👤 Theodore R Kozlowski
- 👤 Dennis A Krygier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:04
CPC Classifications
C; C03; C03C; C03C21/00; C03C21/001; C03C21/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |