US2947649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemically bonded basic refractory
Assignee: Harbison Walker Refractories Co
•
Filing: 1956-07-18
•
Granted: 1960-08-02
•
Expires: 1976-07-18
Abstract
No abstract record available.
Inventors
- 👤 Davies Ben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THAT METHOD OF PREPARING AN UNBURNED BASIC REFRACTORY SHAPE THAT IS RESISTANT TO SLAKING BY WATER, COMPRISING FORMING TO THE DESIRED SHAPE A MIXTURE OF A CHEMICAL BONDING AGENT AND REFRACTORY MATERIAL THAT INCLUDES AT LEAST 5 PERCENT BY WEIGHT OF UNCOMBINED MAGNESIA REFRACTORY, CONTACTING ONLY THE SURFACE OF THE RESULTANT SHAPE WITH A WATER SOLUTION OF A WATER-SOLUBLE PHOSPHATE, THEN DRYING THE PHOSPHATE TREATED SHAPE AND RECOVERING THE RESULTING DRIED, SURFACE TREATED, UNBURNED REFRACTORY SHAPE PRODUCED.
Claim 2
Dependent Claim
77 words
THAT METHOD OF PREPARING AN UNBURNED BASIC REFRACTORY SHAPE THAT IS RESISTANT TO SLAKING BY WATER, COMPRISING FORMING TO THE DESIRED SHAPE A MIXTURE OF A CHEMICAL BONDING AGENT AND REFRACTORY MATERIAL THAT INCLUDES AT LEAST 5 PERCENT BY WEIGHT OF UNCOMBINED MAGNESIA REFRACTORY, CONTACTING ONLY THE SURFACE OF THE RESULTANT SHAPE WITH A WATER SOLUTION OF A WATER-SOLUBLE PHOSPHATE, THEN DRYING THE PHOSPHATE TREATED SHAPE AND RECOVERING THE RESULTING DRIED, SURFACE TREATED, UNBURNED REFRACTORY SHAPE PRODUCED.
References Cited (Backward Citations)
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Cited
US2232462A
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US2479504A
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US2589157A
Cited
US2741565A
Cited
US2683667A
Cited
US2805174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |