US3887384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tough refractory oxide eutectic article
Assignee: RTX Corp
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Filing: 1974-02-27
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Granted: 1975-06-03
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Expires: 1994-02-27
Abstract
Abstract An article exhibiting high toughness to very high temperatures is provided by a directionally-solidified eutectic alloy having a lamellar ZrO2 phase embedded in a matrix of CaO/ZrO2.
Inventors
- 👤 Charles O Hulse
- 👤 John A Batt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:20
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/484; C04B35/486; C04B35/488; C04B35/622; C04B35/653; C04B35/71; C04B35/78; C04B35/80; C30; C30B; C30B21/00; C30B21/04; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3208; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/70; C04B2235/74; C04B2235/76; C04B2235/768; C04B2235/96
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A DIRECTIONALLY SOLIDIFIED REFRACTORY OXIDE COMPOSITE ARTICLE COMPRISING A MAXTRIX PHASE CONSISTING ESSENTIALLY OF A COMPOUND OF CALCIUM OXIDE AND ZIRCONIUM OXIDE AND A REINFORCING PHASE CONSISTING ESSENTIALLY OF ZIRCONIUM OXIDE EMBEDDED THEREIN THE FORM OF LAMELLAE SUBSTANTIALLY ORIENTED IN THE DIRECTION OF PRINCIPAL ANTICIPATED STRESS.
Claim 2
Dependent Claim
46 words
A DIRECTIONALLY SOLIDIFIED REFRACTORY OXIDE COMPOSITE ARTICLE COMPRISING A MAXTRIX PHASE CONSISTING ESSENTIALLY OF A COMPOUND OF CALCIUM OXIDE AND ZIRCONIUM OXIDE AND A REINFORCING PHASE CONSISTING ESSENTIALLY OF ZIRCONIUM OXIDE EMBEDDED THEREIN THE FORM OF LAMELLAE SUBSTANTIALLY ORIENTED IN THE DIRECTION OF PRINCIPAL ANTICIPATED STRESS.
Claim 3
Dependent Claim
47 words
A directionally solidified refractory oxide composite article comprising a matrix phase consisting essentially of a compound of calcium oxide and zirconium oxide and a reinforcing phase consisting essentially of zirconium oxide embedded therein in the form of lamellae substantially oriented in the direction of principal anticipated stress.
Claim 4
Dependent Claim
47 words
A directionally solidified refractory oxide composite article comprising a matrix phase consisting essentially of a compound of calcium oxide and zirconium oxide and a reinforcing phase consisting essentially of zirconium oxide embedded therein in the form of lamellae substantially oriented in the direction of principal anticipated stress.
References Cited (Backward Citations)
US3523915A
Cited
US3761295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |