Patent US3773531A successfully refreshed from Google Patents.
US3773531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dense chrome refractory material
Assignee: CHAS TAYLOR S SONS CO US
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Filing: 1972-07-13
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Granted: 1973-11-20
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Expires: 1992-07-13
Abstract
Abstract A dense chrome refractory material having superior corrosion resistance to molten glass has been prepared, said refractory comprising from 85 percent to 98 percent chromic oxide, from 1 percent to 10 percent zircon and from 0.5 percent to 5 percent of a titanium compound selected from the group consisting of barium titanate and titanium dioxide.
Inventors
- 👤 E Manigault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:00
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/167; C03B5/1672; C03B5/42; C03B5/43; C04; C04B; C04B35/00; C04B35/01; C04B35/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
14 words
Composition according to claim 1 in which the titanium compound employed is barium titanate.
Claim 2
Dependent Claim
15 words
Composition according to claim 1 in which the titanium compound employed is rutile titanium dioxide.
Claim 3
Independent Claim
100 words
A method for the preparation of a dense chrome refractory composition which comprises admixing chromic oxide, zircon and a titanium compound selected from the group consisting of barium titanate and titanium dioxide, the amount of chromic oxide being from 85 percent to 98 percent, the amount of zircon being from 1 percent to 10 percent and the amount of the titanium compound being from 0.5 percent to 5 percent, all of the percentages being expressed by weight, forming said mixture into a shaped body and firing the body at a temperature from 1500*C to 1650*C to form the refractory composition.
Claim 4
Dependent Claim
19 words
Method according to claim 4 in which the shaped body is fired at a temperature from 1560*C to 1600*C.
Claim 5
Dependent Claim
14 words
Method according to claim 4 in which the titanium compound employed is barium titanate.
Claim 6
Dependent Claim
15 words
Method according to claim 4 in which the titanium compound employed is rutile titanium dioxide.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |