US3231401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory composition
Assignee: Unifrax I LLC
•
Filing: 1964-06-22
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Granted: 1966-01-25
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Clair E Price
- 👤 Claire B Walworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:29
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/24; C04B20/00; C04B20/0048; C04B20/0064; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/20; C04B2111/28; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A REFRACTORY COMPOSITION FORMED FROM A SUBSTANTIALLY HOMOGENEOUS MIXTURE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS, EXPRESSED IN APPROXIMATE PERCENTAGES ON A DRY WEIGHT BASIS: FROM 60 PERCENT TO 97 PERCENT OF SAID MIXTURE OF GROUND INORGANIC CERAMIC FIBROUS MATERIAL AND A DISPERSION CONSISTING ESSENTIALLY OF A COLLODIAL INORGANIC OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICA, ZIRCONIA AND ALUMINA IN SUFFICIENT AMOUNT THAT SAID OXIDE CONSTITUTES FROM 3 PERCENT TO 40 PERCENT OF SAID MIXTURE, SAID GROUND FIBROUS MATERIAL CONSISTING OF SHORT FIBERS HAVING A MEAN DIAMETER IN THE RANGE OF FROM ABOUT 2.5 TO ABOUT 20 MICRONS AND A LENGTH TO DIAMETER RATIO IN THE RANGE OF FROM ABOUT 10:1 TO ABOUT 50:1.
Claim 2
Dependent Claim
114 words
A REFRACTORY COMPOSITION FORMED FROM A SUBSTANTIALLY HOMOGENEOUS MIXTURE CONSISTING ESSENTIALLY OF THE FOLLOWING INGREDIENTS, EXPRESSED IN APPROXIMATE PERCENTAGES ON A DRY WEIGHT BASIS: FROM 60 PERCENT TO 97 PERCENT OF SAID MIXTURE OF GROUND INORGANIC CERAMIC FIBROUS MATERIAL AND A DISPERSION CONSISTING ESSENTIALLY OF A COLLODIAL INORGANIC OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICA, ZIRCONIA AND ALUMINA IN SUFFICIENT AMOUNT THAT SAID OXIDE CONSTITUTES FROM 3 PERCENT TO 40 PERCENT OF SAID MIXTURE, SAID GROUND FIBROUS MATERIAL CONSISTING OF SHORT FIBERS HAVING A MEAN DIAMETER IN THE RANGE OF FROM ABOUT 2.5 TO ABOUT 20 MICRONS AND A LENGTH TO DIAMETER RATIO IN THE RANGE OF FROM ABOUT 10:1 TO ABOUT 50:1.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |