US2675324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of refractory materials
Assignee: The General Electric Company PLC
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Filing: 1951-01-10
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Granted: 1954-04-13
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Expires: 1971-01-10
Abstract
No abstract record available.
Inventors
- 👤 Busby Terence Stanley
- 👤 Partridge John Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF MANUFACTURING A COHERENT LOW POROSITY BODY OF REFRACTORY MATERIAL OF THE SILICOALUMINOUS TYPE WHICH COMPRISES THE STEPS OF PREPARING A MIXTURE CONSISTING ESSENTIALLY OF CHINA CLAY AND SUBSTANTIALLY PURE ALUMINA SUCH THAT THE PROPORTION OF ALUMINA IS BETWEEN 15% AND 45% BY WEIGHT OF THE MIXTURE, MOULDING THE SAID MIXTURE TO A DESIRED SHAPE BY THE METHOD OF SLIP-CASTING, AND HEATING THE SAID MIXTURE AT A TEMPERATURE ABOVE 1500* C. BUT BELOW THE FUSION TEMPERATURE OF THE MIXTURE UNTIL ALL THE ALUMINA IS COMBINED WITH SILICA IN THE FORM OF MULLITE.
Claim 2
Independent Claim
94 words
A METHOD OF MANUFACTURING A COHERENT LOW POROSITY BODY OF REFRACTORY MATERIAL OF THE SILICOALUMINOUS TYPE WHICH COMPRISES THE STEPS OF PREPARING A MIXTURE CONSISTING ESSENTIALLY OF CHINA CLAY AND SUBSTANTIALLY PURE ALUMINA SUCH THAT THE PROPORTION OF ALUMINA IS BETWEEN 15% AND 45% BY WEIGHT OF THE MIXTURE, MOULDING THE SAID MIXTURE TO A DESIRED SHAPE BY THE METHOD OF SLIP-CASTING, AND HEATING THE SAID MIXTURE AT A TEMPERATURE ABOVE 1500* C. BUT BELOW THE FUSION TEMPERATURE OF THE MIXTURE UNTIL ALL THE ALUMINA IS COMBINED WITH SILICA IN THE FORM OF MULLITE.
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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |