US3108860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Firing of dolomite and lime refractories
Assignee: Harbison Walker Refractories Co
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Filing: 1960-09-26
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Granted: 1963-10-29
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Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Davies Ben
- 👤 Oscar M Wicken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:43
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/057
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
IN A METHOD OF PREPARING A BURNED REFRACTORY SHAPE FROM A COMPOSITION THAT CONTAINS AT LEAST 50 PERCENT BY WEIGHT OF CALCINED CAO, SAID COMPOSITION BEING GRADED TO PROVIDE A NORMAL GRADED BRICKMAKING GRIND AND THEN FORMED TO THE DESIRED SHAPE, THAT METHOD OF AVOIDING DELETERIOUS HYDRATON DURING THE FIRING THEREOF COMPRISING SHIELDING THE REFRACTORY SHAPE FROM THE ATMOSPHERE AND HEATING IT TO A TEMPERATURE OF AT LEAST 1000*F. WHILE AVOIDING THE INTRODUCTION OF MOISTURE TO THE ATMOSPHERE IN ACTUAL CONTACT WITH THE SHAPE.
Claim 2
Dependent Claim
84 words
IN A METHOD OF PREPARING A BURNED REFRACTORY SHAPE FROM A COMPOSITION THAT CONTAINS AT LEAST 50 PERCENT BY WEIGHT OF CALCINED CAO, SAID COMPOSITION BEING GRADED TO PROVIDE A NORMAL GRADED BRICKMAKING GRIND AND THEN FORMED TO THE DESIRED SHAPE, THAT METHOD OF AVOIDING DELETERIOUS HYDRATON DURING THE FIRING THEREOF COMPRISING SHIELDING THE REFRACTORY SHAPE FROM THE ATMOSPHERE AND HEATING IT TO A TEMPERATURE OF AT LEAST 1000*F. WHILE AVOIDING THE INTRODUCTION OF MOISTURE TO THE ATMOSPHERE IN ACTUAL CONTACT WITH THE 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) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |