US3359124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zircon refractory
Assignee: Harbison Walker Refractories Co
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Filing: 1967-02-16
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Granted: 1967-12-19
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 George R Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:51
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A METHOD OF MAKING CERAMICALLY BONDED, PRESSED ZIRCON SHAPES COMPRISING THE STEPS OF: (1) PREPARING A SIZE-GRADED BATCH OF UP TO 30%, BY WEIGHT, FUSED SILICA, 1 TO 5% CLAY, THE REMAINDER ZIRCON, AND 0.5 TO 5%, BY WEIGHT OF THE BATCH, OF AN ALKALI PHOSPHATE BINDER ADDED, (2) TEMPERING WITH SUFFICIENT WATER SO THAT THE BATCHES OBTAIN PRESSABLE CHARACTER, (3) FORMING THE BATCHES INTO SHAPES BY PRESSING, (4) DRYING THE SHAPES, AND (5) BURNING THE DRIED SHAPES.
Claim 2
Independent Claim
78 words
A METHOD OF MAKING CERAMICALLY BONDED, PRESSED ZIRCON SHAPES COMPRISING THE STEPS OF: (1) PREPARING A SIZE-GRADED BATCH OF UP TO 30%, BY WEIGHT, FUSED SILICA, 1 TO 5% CLAY, THE REMAINDER ZIRCON, AND 0.5 TO 5%, BY WEIGHT OF THE BATCH, OF AN ALKALI PHOSPHATE BINDER ADDED, (2) TEMPERING WITH SUFFICIENT WATER SO THAT THE BATCHES OBTAIN PRESSABLE CHARACTER, (3) FORMING THE BATCHES INTO SHAPES BY PRESSING, (4) DRYING THE SHAPES, AND (5) BURNING THE DRIED SHAPES.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |