Patent US2588646A successfully refreshed from Google Patents.
US2588646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating firebrick and process of manufacture
Assignee: Babcock and Wilcox Co
•
Filing: 1948-03-17
•
Granted: 1952-03-11
•
Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 William A Miller
- 👤 Temple W Ratcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:07
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF MANUFACTURING A HIGH TEMPERATURE INSULATING FIRE BRICK WHICH COMPRISES MILLING A HIGHLY CALCINED NON-PLASTIC REFRACTORY MATERIAL WITH FERROUS PULVERIZING ELEMENTS OF LOWER HARDNESS THAN THE REFRACTORY MATERIAL FOR A PERIOD SUFFICIENT TO FINELY PULVERIZE THE REFRACTORY MATERIAL AND DISPERSE THEREIN A SMALL AMOUNT OF FERROUS PARTICLES, FORMING A THIXOTROPIC SLIP CONTAINING THE MILLED REFRACTORY MATERIAL AND WATER, CHEMICALLY BLOATING THE SLIP BY CHEMICALLY REACTING THE INCLUDED FERROUS PARTICLES WITH ACID TO EVOLVE HYDROGEN IN THE SLIP, CASTING THE SLIP IN A MOLD WHILE ABSORBING WATER FROM THE SLIP TO EFFECT A THIXOTROPIC SET, AND DRYING AND FIRING THE MOLDED SHAPE.
Claim 2
Independent Claim
103 words
THE METHOD OF MANUFACTURING A HIGH TEMPERATURE INSULATING FIRE BRICK WHICH COMPRISES MILLING A HIGHLY CALCINED NON-PLASTIC REFRACTORY MATERIAL WITH FERROUS PULVERIZING ELEMENTS OF LOWER HARDNESS THAN THE REFRACTORY MATERIAL FOR A PERIOD SUFFICIENT TO FINELY PULVERIZE THE REFRACTORY MATERIAL AND DISPERSE THEREIN A SMALL AMOUNT OF FERROUS PARTICLES, FORMING A THIXOTROPIC SLIP CONTAINING THE MILLED REFRACTORY MATERIAL AND WATER, CHEMICALLY BLOATING THE SLIP BY CHEMICALLY REACTING THE INCLUDED FERROUS PARTICLES WITH ACID TO EVOLVE HYDROGEN IN THE SLIP, CASTING THE SLIP IN A MOLD WHILE ABSORBING WATER FROM THE SLIP TO EFFECT A THIXOTROPIC SET, AND DRYING AND FIRING THE MOLDED SHAPE.
References Cited (Backward Citations)
GB189616525A
Cited
US1027004A
Cited
US1050303A
Cited
US2073138A
Cited
DE662204C
Cited
US2136096A
Cited
US2340194A
Cited
US2463979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |