Patent US2947649A successfully refreshed from Google Patents.
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 22:54
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)
US2152152A
Cited
US2232462A
Cited
US2479504A
Cited
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 |