US3395035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin impregnated ceramic heat shield and method of making
Assignee: Lockheed Martin Corp
•
Filing: 1963-10-01
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Granted: 1968-07-30
•
Expires: 1983-10-01
Abstract
No abstract record available.
Inventors
- 👤 Eric L Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:58
CPC Classifications
B; B64; B64G; B64G1/00; B64G1/22; B64G1/52; B64G1/58; F; F42; F42B; F42B15/00; F42B15/34; B64G1/226
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A HEAT SHIELD COMPRISING A MASS OF OPEN PORE POROUS REFRACTORY MATERIAL HAVING LOW THERMAL CONDUCTIVITY OF LESS THAN ABOUT 10 B.T.U.-IN./HR.-FT.2-*F. AT 1000*F. AND HAVING A POROSITY OF AT LEAST 66% BY VOLUME IMPREGNATED WITH AN ABLATING RESIN.
Claim 2
Dependent Claim
39 words
A HEAT SHIELD COMPRISING A MASS OF OPEN PORE POROUS REFRACTORY MATERIAL HAVING LOW THERMAL CONDUCTIVITY OF LESS THAN ABOUT 10 B.T.U.-IN./HR.-FT.2-*F. AT 1000*F. AND HAVING A POROSITY OF AT LEAST 66% BY VOLUME IMPREGNATED WITH AN ABLATING RESIN.
Claim 3
Independent Claim
149 words
THE METHOD OF MAKING A HEAT SHIELD COMPRISING THE STEPS OF PREPARING A MIXTURE CONSISTING OF ABOUT 100 PARTS BY WEIGHT OF UNSTABILIZED ZIRCONIA ABOUT 30 PARTS BY WEIGHT OF ORTHOPHOSPHORIC ACID, AND SUFFICIENT WATER TO OBTAIN A SLURRY WITH A DENSITY OF ABOUT 1.5, IMPREGNATING A MASS OF HIGH-FIRED, POROUS, OPEN-CELL SILICON CARBIDE WITH SAID SLURRY, SAID SILICON CARBIDE MASS HAVING A VOLUME OF PORES AT LEAST TWICE THE VOLUME OF SILICA CARBIDE AND AN AVERAGE CELL SIZE OF AT LEAST ABOUT 250 MICRONS, FIRING THE IMPREGNATED CERAMIC SO OBTAINED SO AS TO PROVIDE A THIN ADHERENT LAYER OF ZIRCONIA ON THE WALLS OF THE CELLS OF SAID CERAMIC, COOLING SAID CERAMIC, IMPREGNATING THE ZIRCONIA-IMPREGNATED SILICON CARBIDE TO A PREDETERMINED DEPTH WITH A LIQUID RESIN ADAPTED TO BE POLYMERIZED TO THE SOLID STATE UNDER A PRESSURE LESS THAN THE COMPRESSIVE STRENGTH OF SAID CERAMIC, AND SOLIDIFYING SAID RESIN.
Claim 4
Independent Claim
149 words
THE METHOD OF MAKING A HEAT SHIELD COMPRISING THE STEPS OF PREPARING A MIXTURE CONSISTING OF ABOUT 100 PARTS BY WEIGHT OF UNSTABILIZED ZIRCONIA ABOUT 30 PARTS BY WEIGHT OF ORTHOPHOSPHORIC ACID, AND SUFFICIENT WATER TO OBTAIN A SLURRY WITH A DENSITY OF ABOUT 1.5, IMPREGNATING A MASS OF HIGH-FIRED, POROUS, OPEN-CELL SILICON CARBIDE WITH SAID SLURRY, SAID SILICON CARBIDE MASS HAVING A VOLUME OF PORES AT LEAST TWICE THE VOLUME OF SILICA CARBIDE AND AN AVERAGE CELL SIZE OF AT LEAST ABOUT 250 MICRONS, FIRING THE IMPREGNATED CERAMIC SO OBTAINED SO AS TO PROVIDE A THIN ADHERENT LAYER OF ZIRCONIA ON THE WALLS OF THE CELLS OF SAID CERAMIC, COOLING SAID CERAMIC, IMPREGNATING THE ZIRCONIA-IMPREGNATED SILICON CARBIDE TO A PREDETERMINED DEPTH WITH A LIQUID RESIN ADAPTED TO BE POLYMERIZED TO THE SOLID STATE UNDER A PRESSURE LESS THAN THE COMPRESSIVE STRENGTH OF SAID CERAMIC, AND SOLIDIFYING SAID RESIN.
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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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |