US3241987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density, high refractory ceramic composition for open hearth furnace bottoms and method
Assignee: Quigley Co Inc
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Filing: 1962-02-16
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Granted: 1966-03-22
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Expires: 1982-02-16
Abstract
No abstract record available.
Inventors
- 👤 Alfred P Dreyling
- 👤 Lewis J Dreyling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/632; C04B35/66; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2111/00; C04B2111/00034; C04B2111/00086; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A CERAMIC COMPOSITION FOR USE IN FORMING WHEN FIRED, A HIGHLY DENSE REFRACTORY MONOLITHIC COATING OF LOW POROSITY ON OPEN HEARTH FURNANCE BOTTOMS, SAID COMPOSITION CONTAINING FROM 85% TO 98% BY WEIGHT OF MAGNESIA OF THE CLASS CONSISTING OF DEAD BURNED MAGNESIA AND FUSED MAGNESIA AND FROM 2% TO 15% BY WEIGHT OF BINDER MATERIAL CONSISTING OF SALT MOLECULES EACH CONTAINING BASIC AND ACID COMPONENTS, THE ACID COMPONENT CONTAINING AN ELEMENT OF THE CLAS CONSISTING OF BORON AND PHOSPHOROUS, SAID BINDER MATERIAL HAVING THE PROPERTY OF NOT REACTING WITH THE MAGNESIA BEFORE FIRING, SAID BASIC COMPONENT BEING OF SUCH CHARACTER THAT IT WILL BE DRIVEN OFF IN GASEOUS FORM AT THE LOWER TEMPERATURES OF FIRING AND SAID ACID COMPONENT REACTING WITH THE MAGNESIA AT THE HIGHER TEMPERATURES OF FIRING AND FORMING MAGNESIA COMOUNDS OF HIGH REFRACTORINESS AND LOW POROSITY.
Claim 2
Dependent Claim
139 words
A CERAMIC COMPOSITION FOR USE IN FORMING WHEN FIRED, A HIGHLY DENSE REFRACTORY MONOLITHIC COATING OF LOW POROSITY ON OPEN HEARTH FURNANCE BOTTOMS, SAID COMPOSITION CONTAINING FROM 85% TO 98% BY WEIGHT OF MAGNESIA OF THE CLASS CONSISTING OF DEAD BURNED MAGNESIA AND FUSED MAGNESIA AND FROM 2% TO 15% BY WEIGHT OF BINDER MATERIAL CONSISTING OF SALT MOLECULES EACH CONTAINING BASIC AND ACID COMPONENTS, THE ACID COMPONENT CONTAINING AN ELEMENT OF THE CLAS CONSISTING OF BORON AND PHOSPHOROUS, SAID BINDER MATERIAL HAVING THE PROPERTY OF NOT REACTING WITH THE MAGNESIA BEFORE FIRING, SAID BASIC COMPONENT BEING OF SUCH CHARACTER THAT IT WILL BE DRIVEN OFF IN GASEOUS FORM AT THE LOWER TEMPERATURES OF FIRING AND SAID ACID COMPONENT REACTING WITH THE MAGNESIA AT THE HIGHER TEMPERATURES OF FIRING AND FORMING MAGNESIA COMOUNDS OF HIGH REFRACTORINESS AND LOW POROSITY.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |