Patent US3279930A successfully refreshed from Google Patents.
US3279930A
Expired / Lapsed
US
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Ceramic product and its preparation
Assignee: Foote Mineral Co
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Filing: 1964-06-25
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Granted: 1966-10-18
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Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Roland R Van Der Beck Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A CERAMIC PRODUCT CONSISTING ESSENTIALLY OF AN INTIMATE SINTERED MIXTURE OF CLAY AND SPODUMENE IN A PROPORTION OF FROM ABOUT 40 TO ABOUT 60%, OF THE FORMER TIO FORM ABOUT 60 TO ABOUT 40% OF THE LATTER, SAID PRODUCT HAVING A COEFFICIENT OF THERMAL EXPANSION NOT APPRECIABLY IN EXCESS OF 1+10-6IN./IN./*C. AND SHOWING BY X-RAY DIFFRACTION ESSENTIALLY MULLITE AND B-SPONDUMENE SOLID SOLUTION WHICH THERE ARE FROM ABOUT 6 TO 8 MOLS OF SIO2 PER MOL OF LI2O AND OF AL2O3.
References Cited (Backward Citations)
US2785080A
Cited
US2880098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |