Patent US3663244A successfully refreshed from Google Patents.
US3663244A
Expired / Lapsed
US
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High durability lead titanate-containing enamel for glass ceramics
Assignee: Corning Glass Works
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Filing: 1970-04-28
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Granted: 1972-05-16
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Expires: 1990-04-28
Abstract
Abstract This invention relates to a method of making and applying a thermally devitrifiable glass enamel for decorating or protecting glass-ceramic ware which has a high resistance to acid and alkaline attack and improved resistance to impact and abrasion.
Inventors
- 👤 Francis Willis Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:19
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0054; C03C4/00; C03C8/00; C03C8/02; C03C8/10; C03C2204/00; C03C2204/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
An enamel according to claim 1 containing at least one constituent in the indicated proportion selected from the group consisting of 0-2% CaO, 0-1% Fe2O3, 0-1% CoO and 0-4% SnO2, and wherein the SiO2 content is reduced by an amount equal to the SnO2 content.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |