US3025175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic materials
Assignee: Morgan Advanced Materials PLC
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Filing: 1953-01-29
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Granted: 1962-03-13
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Expires: 1973-01-29
Abstract
No abstract record available.
Inventors
- 👤 Aldred Francis Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025; C04B35/00; C04B35/01; C04B35/10; C04B35/101
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FIRED SUBSTANTIALLY NON-GLASS CONTAINING CERAMIC MATERIAL CHARACTERIZED IN THAT IT HAS A MATRIX CONSISTING SUBSTANTIALLY WHOLLY OF SINTERED CRYSTALS OF A REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINA, BAUXITE, UNCALCINED KYANITE, CALCINED KYANITE, FUSED SILICA MULLITE, STABILIZED ZIRCONIA ND MOLECHITE, OF PARTICLE SIZE FINER THAN 100 B.S.S. MESH, DOWN TO 300 B.S.S., AND THAT THERE IS EMBEDDED IN SAID MATRIX A A COARSER ADDITIVE CONSISTING OF GRAINS OF AT LEAST ONE OTHER MATERIAL DIFFERENT FROM THE MATRIX MATERIAL BUYT SELECTED FROM THE ABOVE GROUP OF REFRACTORY MATERIALS, OF PARTICLE SIZE COASER THAN 200 B.S.S. MESH UP TO 22 B.S.S. MESH, THE AMOUNT OF COARSER MATERIAL BEING FROM 10 TO 50% BY VOLUME OF THE WHOLE MATERIAL.
Claim 2
Dependent Claim
119 words
A FIRED SUBSTANTIALLY NON-GLASS CONTAINING CERAMIC MATERIAL CHARACTERIZED IN THAT IT HAS A MATRIX CONSISTING SUBSTANTIALLY WHOLLY OF SINTERED CRYSTALS OF A REFRACTORY MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINA, BAUXITE, UNCALCINED KYANITE, CALCINED KYANITE, FUSED SILICA MULLITE, STABILIZED ZIRCONIA ND MOLECHITE, OF PARTICLE SIZE FINER THAN 100 B.S.S. MESH, DOWN TO 300 B.S.S., AND THAT THERE IS EMBEDDED IN SAID MATRIX A A COARSER ADDITIVE CONSISTING OF GRAINS OF AT LEAST ONE OTHER MATERIAL DIFFERENT FROM THE MATRIX MATERIAL BUYT SELECTED FROM THE ABOVE GROUP OF REFRACTORY MATERIALS, OF PARTICLE SIZE COASER THAN 200 B.S.S. MESH UP TO 22 B.S.S. MESH, THE AMOUNT OF COARSER MATERIAL BEING FROM 10 TO 50% BY VOLUME OF THE WHOLE MATERIAL.
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) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |