Patent US2854869A successfully refreshed from Google Patents.
US3246972A
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Method of making ceramic article
Assignee: Corning Glass Works
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Filing: 1961-08-18
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Granted: 1966-04-19
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Expires: 1981-08-18
Abstract
No abstract record available.
Inventors
- 👤 Gail P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:05
CPC Classifications
C; C03; C03C; C03C27/00; C03C10/00; C03C10/0018; C03C10/0027; C03C10/0054; C03C8/00; C03C8/24; C03C8/245; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B2237/00; C04B2237/02; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/341; C04B2237/50; C04B2237/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF MAKING A UNITARY, LOW EXPANSION CERAMIC ARTICLE WHICH COMPRISES MIXING A BATCH COMPRISING 50-95% BY WEIGHT OF CRYSTALLINE LIGHIA-ALUMINOSILICATES AND 50-5% BY WEIGHT OF A THERMALLY DEVITRIFIABLE LITHIAALUMINOSILICATE GLASS, SAID GLASS COMPRISING LI2O, AL2O3, AND SIO2 IN SUCH AMOUNTS THAT A MAJOR PORTION OF THE GLASS CAN BE PRECIPITATED AS A LOW EXPANSION CRYSTALLINE LITHIA-ALUMINOSILICATE, FORMING THE BATCH TO AN ARTICLE OF THE DESIRED SHAPE, FIRING THE ARTICLE AT A TEMPERATURE BETWEEN THE SINTERING TEMPERATURE AND THE DEFORMING TEMPERATURE TO SINTER THE BATCH MATERIAL AND THERMALLY DEVITRIFY SAID GLASS, AND THEREAFTER COOLING THE ARTICLE.
Claim 2
Independent Claim
97 words
THE METHOD OF MAKING A UNITARY, LOW EXPANSION CERAMIC ARTICLE WHICH COMPRISES MIXING A BATCH COMPRISING 50-95% BY WEIGHT OF CRYSTALLINE LIGHIA-ALUMINOSILICATES AND 50-5% BY WEIGHT OF A THERMALLY DEVITRIFIABLE LITHIAALUMINOSILICATE GLASS, SAID GLASS COMPRISING LI2O, AL2O3, AND SIO2 IN SUCH AMOUNTS THAT A MAJOR PORTION OF THE GLASS CAN BE PRECIPITATED AS A LOW EXPANSION CRYSTALLINE LITHIA-ALUMINOSILICATE, FORMING THE BATCH TO AN ARTICLE OF THE DESIRED SHAPE, FIRING THE ARTICLE AT A TEMPERATURE BETWEEN THE SINTERING TEMPERATURE AND THE DEFORMING TEMPERATURE TO SINTER THE BATCH MATERIAL AND THERMALLY DEVITRIFY SAID GLASS, AND THEREAFTER COOLING THE ARTICLE.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |