US3328183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractories
Assignee: Union Carbide Corp
•
Filing: 1965-08-16
•
Granted: 1967-06-27
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Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Loyal A Stoyell
- 👤 Harold S Redline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:15
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/0473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
AS A REFRACTORY MATERIAL, A MELTED AND RESOLIDIFIED AND PARTICULATED MIXTURE OF CHROME ORE AND MAGNESIA CONSISTING ESSENTIALLY OF BY ANALYSIS 15 TO 25 PERCENT CR2O3; 45 TO 75 PERCENT MGO; 4 TO 20 PERCENT AL2O3; 3 TO 15 PERCENT FEO; 0.5 TO 3.0 PERCENT SIO2; AND UP TO 3 PERCENT CAO; THE MOLAR RATIO OF CAO AND SIO2 IN SAID MATERIAL BEING NO GREATER THAN 2:1 AND THE STRUCTURE OF SAID MATERIAL COMPRISING PREDOMINANTLY, RELATIVELY LARGE, ABUTTING GRAINS OF PERICLASE, CRYSTALS OF SPINEL CONTAINED WITHIN SAID PERICLASE GRAINS, THE MAJOR PORTION OF SPINEL BEING IN THE FORM OF CRYSTALS HAVING A MIXIMUM DIMENSION NOT GREATER THAN 10 MICRONS; AND ISOLATED POCKETS OF SILICATES.
Claim 2
Dependent Claim
114 words
AS A REFRACTORY MATERIAL, A MELTED AND RESOLIDIFIED AND PARTICULATED MIXTURE OF CHROME ORE AND MAGNESIA CONSISTING ESSENTIALLY OF BY ANALYSIS 15 TO 25 PERCENT CR2O3; 45 TO 75 PERCENT MGO; 4 TO 20 PERCENT AL2O3; 3 TO 15 PERCENT FEO; 0.5 TO 3.0 PERCENT SIO2; AND UP TO 3 PERCENT CAO; THE MOLAR RATIO OF CAO AND SIO2 IN SAID MATERIAL BEING NO GREATER THAN 2:1 AND THE STRUCTURE OF SAID MATERIAL COMPRISING PREDOMINANTLY, RELATIVELY LARGE, ABUTTING GRAINS OF PERICLASE, CRYSTALS OF SPINEL CONTAINED WITHIN SAID PERICLASE GRAINS, THE MAJOR PORTION OF SPINEL BEING IN THE FORM OF CRYSTALS HAVING A MIXIMUM DIMENSION NOT GREATER THAN 10 MICRONS; AND ISOLATED POCKETS OF SILICATES.
References Cited (Backward Citations)
US3079452A
Cited
US3116156A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |