Patent US3352702A successfully refreshed from Google Patents.
US3352702A
Expired / Lapsed
US
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Process for manufacturing basic refractory bricks
Assignee: Osterreichisch Amerikanische Magnesit AG
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Filing: 1965-03-15
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Granted: 1967-11-14
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Expires: 1985-03-15
Abstract
No abstract record available.
Inventors
- 👤 Leitner Karl
- 👤 Mlaker Gunther Josef
- 👤 Moll Otto
- 👤 Skalla Norbert Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:25
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A PROCESS FOR THE MANUFACTURE OF BASIC REFRACTORY BRICKS, BRICKS AND TAMPING MIXTURES CONTAINING AN ORGANIC BINDER WHICH COMPRISES SINTERING BASIC REFRACTORY GRAIN MATERIAL TO A SINTER GRADE OF AT LEAST 90%, HEATING COARSE GRIN MATERIAL OF SAID BASIC REFRACTORY GRAIN MATERIAL GREATER THAN 0.1 MM. IN SIZE TO A TEMPERATURE OF FROM 100* TO 200*C., SAID GRAINS BEING SEPARATELY HEATED IN FRACTIONAL AMOUNTS ACCORDING TO GRAIN SIZE, COMBINING SAID HEATED COARSE GRAIN FRACTIONS, THOROUGHLY MIXING THEREWITH AN ORGANIC BINDER WHICH HAS BEEN HEATED TO A TEMPERATURE OF FROM 100 TO 200*C., HEATING FINE GRAIN MATERIAL OF SAID BASIC REFRACTORY GRAIN MATERIAL LESS THAN 0.1 MM. IN SIZE TO A TEMPERATURE OF FROM 100 TO 200*C., SUBSEQUENTLY MIXING THE HEATED UNCOATED FINE GRAIN WITH THE PREVIOUSLY MADE MIXTURE OF BINDER AND COARSE GRAIN AND SHAPING THE RESULTING MIXTURE INTO THE DESIRED SHAPE.
Claim 2
Dependent Claim
142 words
A PROCESS FOR THE MANUFACTURE OF BASIC REFRACTORY BRICKS, BRICKS AND TAMPING MIXTURES CONTAINING AN ORGANIC BINDER WHICH COMPRISES SINTERING BASIC REFRACTORY GRAIN MATERIAL TO A SINTER GRADE OF AT LEAST 90%, HEATING COARSE GRIN MATERIAL OF SAID BASIC REFRACTORY GRAIN MATERIAL GREATER THAN 0.1 MM. IN SIZE TO A TEMPERATURE OF FROM 100* TO 200*C., SAID GRAINS BEING SEPARATELY HEATED IN FRACTIONAL AMOUNTS ACCORDING TO GRAIN SIZE, COMBINING SAID HEATED COARSE GRAIN FRACTIONS, THOROUGHLY MIXING THEREWITH AN ORGANIC BINDER WHICH HAS BEEN HEATED TO A TEMPERATURE OF FROM 100 TO 200*C., HEATING FINE GRAIN MATERIAL OF SAID BASIC REFRACTORY GRAIN MATERIAL LESS THAN 0.1 MM. IN SIZE TO A TEMPERATURE OF FROM 100 TO 200*C., SUBSEQUENTLY MIXING THE HEATED UNCOATED FINE GRAIN WITH THE PREVIOUSLY MADE MIXTURE OF BINDER AND COARSE GRAIN AND SHAPING THE RESULTING MIXTURE INTO THE DESIRED SHAPE.
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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |