Patent US3393079A successfully refreshed from Google Patents.
US3393079A
Expired / Lapsed
US
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Porous ceramic oxides and method
Assignee: Boeing Co
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Filing: 1963-05-29
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Granted: 1968-07-16
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Masoero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:27
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/02; C01; C01G; C01G25/00; C01G25/02; C04B28/00; C04B28/14; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A PROCESS FOR SYNTHESIZING A PERMEABLE ZIRCONIUM DIOXIDE MATERIAL HAVING MICROPOROSITY AND MACROPOROSITY COMPRISING: (A) MIXING ZIRCONIUM DIOXIDE POWDER AND PLASTER OF PARIS POWDER INTO A HOMOGENEOUS POWDER, (B) MIXING WATER INTO THE HOMOGENEOUS POWDER, (C) INCORPORATING A CALCULATED RATIO OF ACID AND ZIRCONIUM METAL POWDER INTO THE MIXTURE OF STEP (B) THUS PRODUCING EFFERVESCENCE BY THE REACTION OF THE ACID AND THE ZIRCONIUM METAL POWDER WHICH GIVES A POROUS BODY OF MATERIAL, (D) PRELIMINARILY HEATING THE POROUS BODY OF STEP (C) TO A TEMPERATURE SUFFICIENT TO ELIMINATE MOISTURE, AND (E) FIRING THE POROUS BODY OF STEP (C) AT ELEVATED TEMPERATURE.
Claim 2
Dependent Claim
77 words
A MEANS FOR ACHIEVING POROSITY FOR A FINAL FIRED ZIRCONIUM DIOXIDE STRUCTURE COMPRISING MIXING A RATIO OF ACID AND ZIRCONIUM POWDER INTO A WATER SLURRY OF ZIRCONIUM DIOXIDE POWDER AND PLASTER OF PARIS, SAID RATIO OF ACID AND ZIRCONIUM POWDER BEING BASED ON THE SURFACE AREAS OF ZIRCONIUM POWDER AVAILABLE TO REACT WITH EACH UNIT OF ACID AND SAID RATIO OF ACID TO ZIRCONIUM POWDER PRODUCING HYDROGEN GAS WHICH PROMOTES THE POROSITY IN THE FINAL FIRED STRUCTURE.
Claim 3
Dependent Claim
6 words
A PERMEABLE REFRACTORY OXIDE MATRIX COMPRISING:
References Cited (Backward Citations)
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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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |