Patent US2874071A successfully refreshed from Google Patents.
US2874071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory body resistant to thermal shock
Assignee: Steatite Research Corp
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Filing: 1952-09-12
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Granted: 1959-02-17
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Expires: 1972-09-12
Abstract
No abstract record available.
Inventors
- 👤 Gerhard E Kadisch
- 👤 Joseph M Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/14; C04B28/00; C04B28/02; C04B28/06; C04B35/16; C04B35/18; C04B35/195
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
AS AN ARTICLE OF MANUFACTURE A BODY OF REFRACTORY MATERIAL. SAID REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF, ON THE DRY BASIS, 50-95% OF PARTICLES OF FUSED SILICA AND 50-5% OF CALCIUM ALUMINATES, SAID BODY CONTAING A COATING OF A SUPER REFRACTORY COMPOSITION CONSISTING ESSENTIALLY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINA, ZIRCONIA, REFRACTORY BORIDES, NITRIDES, AND CARBIDES AND MIXTURES THEREOF.
References Cited (Backward Citations)
US447972A
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US1374403A
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US1554225A
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US1969751A
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US2017723A
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US2516892A
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GB773709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |