US2543752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory and semirefractory materials and process for manufacture
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1950-03-07
•
Granted: 1951-03-06
•
Expires: 1970-03-07
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Austin
- 👤 Rhodes Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:16
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B28/184; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A CURED, CEMENTITIOUS TILE, BUILDING UNIT OR THE LIKE SHAPED ARTICLE OF HIGH STRENGTH, VOLUME STABILITY AND RESISTANCE TO HEAT AND MOISTURE COMPOSED OF A MIXTURE STEAM-TREATED UNDER PRESSURE AND CONTAINING A MAJOR AMOUNT OF RELATIVELY COARSE AGGREGATE BONDED BY A MINOR AMOUNT OF MATERIAL COMPRISING ESSENTIALLY FINELY DIVIDED MAGNESIA AND VOLATILIZED SILICA WHEREIN THE RATIO BY WEIGHT OF MAGNESIA TO SILICA IS FROM ABOUT 5 TO 1 TO 0.5 TO 1.
Claim 2
Dependent Claim
72 words
A CURED, CEMENTITIOUS TILE, BUILDING UNIT OR THE LIKE SHAPED ARTICLE OF HIGH STRENGTH, VOLUME STABILITY AND RESISTANCE TO HEAT AND MOISTURE COMPOSED OF A MIXTURE STEAM-TREATED UNDER PRESSURE AND CONTAINING A MAJOR AMOUNT OF RELATIVELY COARSE AGGREGATE BONDED BY A MINOR AMOUNT OF MATERIAL COMPRISING ESSENTIALLY FINELY DIVIDED MAGNESIA AND VOLATILIZED SILICA WHEREIN THE RATIO BY WEIGHT OF MAGNESIA TO SILICA IS FROM ABOUT 5 TO 1 TO 0.5 TO 1.
References Cited (Backward Citations)
US805242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |