US3116156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fused refractory grain
Assignee: Union Carbide Corp
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Filing: 1962-06-27
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Granted: 1963-12-31
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Fedia R Charvat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/03; C04B35/04; C04B35/043; C04B35/047; C04B35/0473; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
AS A REFRACTORY MATERIAL, A MELTED AND RE-SOLIDIFIED 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 15.0 PERCENT FEO; 0.5 TO 3.0 PERCENT SIO2: AND UP TO 3.0 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, AND ISOLATED POCKETS OF SILICATES CONTAINED WITHIN SAID PERICALSE GRAINS.
Claim 2
Dependent Claim
97 words
AS A REFRACTORY MATERIAL, A MELTED AND RE-SOLIDIFIED 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 15.0 PERCENT FEO; 0.5 TO 3.0 PERCENT SIO2: AND UP TO 3.0 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, AND ISOLATED POCKETS OF SILICATES CONTAINED WITHIN SAID PERICALSE GRAINS.
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |