Patent US3745042A successfully refreshed from Google Patents.
US3423217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ceramic shapes
Assignee: Selas Corp of America
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Filing: 1963-07-11
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Granted: 1969-01-21
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Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Emil Blaha
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/195
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF MAKING A CERAMIC SHAPE WHICH COMPRISES MIXING INGREDIENTS INTO A BATCH WHICH WILL PRODUCE A MATERIAL THAT IS ESSENTIALLY GLASS CONSISTING OF FROM 8% TO 28% BY WEIGHT OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND MAGNESIUM OXIDE AND A MIXTURE OF THE TWO, FROM 10% TO 25% BY WEIGHT OF ALUMINA AND THE REMAINDER SILICA, MELTING THE BATCH, QUENCING IT, PULVERIZING THE QUENCHED MATERIAL AND MIXING IT WITH FROM ABOUT 15% UP TO 25% BY WEIGHT OF BALL CLAY AND FROM ABOUT 15% UP TO 25% BY WEIGHT OF TALC, MOISTENING THE LATTER MIXTURE SUFFICIENTLY TO SHAPE IT, SHAPING IT, AND FIRING THE SHAPE TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO SINTER THE PULVERIZED GLASS BATCH TO FORM A RIGID CERAMIC SHAPE.
Claim 2
Independent Claim
131 words
THE METHOD OF MAKING A CERAMIC SHAPE WHICH COMPRISES MIXING INGREDIENTS INTO A BATCH WHICH WILL PRODUCE A MATERIAL THAT IS ESSENTIALLY GLASS CONSISTING OF FROM 8% TO 28% BY WEIGHT OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND MAGNESIUM OXIDE AND A MIXTURE OF THE TWO, FROM 10% TO 25% BY WEIGHT OF ALUMINA AND THE REMAINDER SILICA, MELTING THE BATCH, QUENCING IT, PULVERIZING THE QUENCHED MATERIAL AND MIXING IT WITH FROM ABOUT 15% UP TO 25% BY WEIGHT OF BALL CLAY AND FROM ABOUT 15% UP TO 25% BY WEIGHT OF TALC, MOISTENING THE LATTER MIXTURE SUFFICIENTLY TO SHAPE IT, SHAPING IT, AND FIRING THE SHAPE TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO SINTER THE PULVERIZED GLASS BATCH TO FORM A RIGID CERAMIC SHAPE.
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |