Patent US3189477A successfully refreshed from Google Patents.
US3189477A
Expired / Lapsed
US
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Oxidation-resistant ceramics and methods of manufacturing the same
Assignee: Unifrax I LLC
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Filing: 1960-04-13
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Granted: 1965-06-15
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Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Peter T B Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:05
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58078; C04B35/583; C04B35/622; C04B35/626; C04B35/63; C04B35/6303; C04B35/632; C04B35/634; C04B35/63404; C04B35/63416; C04B41/009; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/5071; C04B41/87; C23; C23C; C23C24/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/24997; Y10T428/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A COMPOSITE, OXIDATION-RESISTANT REFRACTORY ARTICLE COMPRISING A REFRACTORY BODY PORTION AND A SINTERED COATING OF AN OXIDATION-RESISTANT REFRACTORY MATERIAL ON AT LEAST ONE EXTERNAL SURFACE THEREOF, SAID COATING BEING FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF AT LEAST 50 MOLE PERCENT OF A BORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND HAFNIUM AND UP TO 50 MOLE PERCENT OF A COMPOUND SELCTED FROM THE GROUP CONSISTING OF MOLYBDENUM SILICIDE, ZIRCONIUM SILICIDE, TUNGSTEN SILICIDE, TANTALUM SILICON CARBIDE, SILICON, BORON NI-
Claim 2
Dependent Claim
83 words
A COMPOSITE, OXIDATION-RESISTANT REFRACTORY ARTICLE COMPRISING A REFRACTORY BODY PORTION AND A SINTERED COATING OF AN OXIDATION-RESISTANT REFRACTORY MATERIAL ON AT LEAST ONE EXTERNAL SURFACE THEREOF, SAID COATING BEING FORMED FROM A MIXTURE CONSISTING ESSENTIALLY OF AT LEAST 50 MOLE PERCENT OF A BORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZIRCONIUM AND HAFNIUM AND UP TO 50 MOLE PERCENT OF A COMPOUND SELCTED FROM THE GROUP CONSISTING OF MOLYBDENUM SILICIDE, ZIRCONIUM SILICIDE, TUNGSTEN SILICIDE, TANTALUM SILICON CARBIDE, SILICON, BORON NI-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |