US3083111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace lining brick
Assignee: Union Carbide Corp
•
Filing: 1960-06-20
•
Granted: 1963-03-26
•
Expires: 1980-06-20
Abstract
No abstract record available.
Inventors
- 👤 John D Nickerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C21; C21B; C21B7/00; C21B7/04; C21B7/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
AN ALKALI RESISTANT LINING BRICK FOR USE IN METAL ORE REDUCTION APPARATUS COMPOSED OF CARBON AND HAVING A SILICIC MATERIAL THEREIN SELECTED FROM THE GROUP CONSISTING OF SILICON, SILICA, AND FERRO-SILICON ALLOYS IN A PROPORTION SUFFICIENT TO CONTRIBUTE THE EFFECTIVE EQUIVALENT OF 2 TO 5 WEIGHT PERCENT SILICON TO SAID BRICK WHEN SAID BRICK IS HEATED AT 800*C. TO 12*C. IN THE PRESENCE OF ALKALI, SAID SILICIC MATERIAL EFFECTIVELY INHIBITING ALKALI ATTACK ON SAID BRICK AT ELEVATED TEMPERATURES.
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) | 1966-03-25 | 1966-09-24 | 1967-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-25 | 1970-09-24 | 1971-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-25 | 1974-09-24 | 1975-03-26 | $7700.00 | Window Closed / Lapsed |