Patent US2740554A successfully refreshed from Google Patents.
Patent US2928751A successfully refreshed from Google Patents.
US2928751A
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Ceramic substance and method of making
Assignee: Georgia Kaolin Co
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Filing: 1956-03-22
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Granted: 1960-03-15
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Expires: 1976-03-22
Abstract
No abstract record available.
Inventors
- 👤 Sanford C Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:59
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/025
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
A CERAMIC MATERIAL CONSISTING OF KAOLINITIC PARTICLES OF ORIGINAL SIZE BETWEEN 2 MICRONS AND 50 MICRONS EQUIVALENT SPHERICAL DIAMETER WHICH HAVE BEEN CALCINED AT A TEMPERATURE BETWEEN 600* AND 1000*C. IN THE PRESENCE OF NOT OVER 30% OF CLAY PARTICLES SMALLER THAN 2 MICRONS EQUIVALENT SPHERICAL DIAMETER, MIXED WITH KAOLINITIC PARTICLES SMALLER THAN 2 MICRONS EQUIVALENT SPHERICAL DIAMETER IN A RATION OF WEIGHTS APPROXIMATELY 663 TO 37.
References Cited (Backward Citations)
GB189415834A
Cited
US1446238A
Cited
US2041721A
Cited
GB461837A
Cited
US2179154A
Cited
US2585116A
Cited
US2801183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |