US3342616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory with periclase-based stabilized solid solution
Assignee: Saint Gobain Ceramics and Plastics Inc
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Filing: 1965-09-20
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Granted: 1967-09-19
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Allen M Alper
- 👤 Robert C Doman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:37
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/03; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A BASIC REFRACTORY COMPRISING ESSENTIALLY A STABILIZED SOLID SOLUTION PHASE OF LI2O AND SELECTED R2O3 OXIDE IN A PERICLASE TYPE CRYSTAL LATTICE OF RO OXIDE, AT LEAST 50% BY WEIGHT OF SAID RO OXIDE BEING MGO AND 0% TO 50% BY WEIGHT OF SAID RO OXIDE BEING SELECTED FROM THE GROUP CONSISTING OF CAO, MNO, FEO, COO, NIO, CUO, ZNO, CDO AND MISTURES THREOF, SAID SELECTED R2O3 OXIDE BEING SELECTED FROM THE GROUP CONSISTING OF AL2O3, CR2O3, MN2O3, AND COMBINATIONS THEREOF, AND SAID REFRACTORY AS A WHOLE CONSISTING OF ANALYTICALLY BY WEIGHT: (A) 0.1 TO 15% LI2O (B) AT LEAST 6% OF THE AFORESAID SELECTED R2O3 OXIDE (C) AT LEAST 35% OF THE AFORESAID RO OXIDE (D) THE SUM OF (A) PLUS (B) PLUS (C) BEING AT LEAST 90% (E) 0% TO 7% FLUORINE (F) 0% TO 8% SIO2 (G) 0% TO 10% TIO2 (H) 0% TO 2% OTHER INCIDENTAL IMPURITIES NATURALLY OCCURRING IN THE RAW MINERAL MATERIALS EMPLOYED THEREFOR.
Claim 2
Dependent Claim
160 words
A BASIC REFRACTORY COMPRISING ESSENTIALLY A STABILIZED SOLID SOLUTION PHASE OF LI2O AND SELECTED R2O3 OXIDE IN A PERICLASE TYPE CRYSTAL LATTICE OF RO OXIDE, AT LEAST 50% BY WEIGHT OF SAID RO OXIDE BEING MGO AND 0% TO 50% BY WEIGHT OF SAID RO OXIDE BEING SELECTED FROM THE GROUP CONSISTING OF CAO, MNO, FEO, COO, NIO, CUO, ZNO, CDO AND MISTURES THREOF, SAID SELECTED R2O3 OXIDE BEING SELECTED FROM THE GROUP CONSISTING OF AL2O3, CR2O3, MN2O3, AND COMBINATIONS THEREOF, AND SAID REFRACTORY AS A WHOLE CONSISTING OF ANALYTICALLY BY WEIGHT: (A) 0.1 TO 15% LI2O (B) AT LEAST 6% OF THE AFORESAID SELECTED R2O3 OXIDE (C) AT LEAST 35% OF THE AFORESAID RO OXIDE (D) THE SUM OF (A) PLUS (B) PLUS (C) BEING AT LEAST 90% (E) 0% TO 7% FLUORINE (F) 0% TO 8% SIO2 (G) 0% TO 10% TIO2 (H) 0% TO 2% OTHER INCIDENTAL IMPURITIES NATURALLY OCCURRING IN THE RAW MINERAL MATERIALS EMPLOYED THEREFOR.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |