Patent US4225852A successfully refreshed from Google Patents.
Patent US3250833A successfully refreshed from Google Patents.
US3250833A
Expired / Lapsed
US
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Process of making an impregnated ceramic
Assignee: Avco Corp
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Filing: 1959-05-29
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Granted: 1966-05-10
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Expires: 1979-05-29
Abstract
No abstract record available.
Inventors
- 👤 Richard B Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:42
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/01; C04B35/14; C04B41/45; C04B41/46; C04B41/48; C04B41/80; C04B41/81; C04B41/82; C04B41/83; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
THE PROCESS OF MAKING AN ABLATION TYPE MATERIAL COMPRISING THE STEPS OF INTIMATELY MIXING SILICA IN POWDER AND COMMUNITED FIBER FORM, BLENDING THE MIXTURE WITH WATER TO FORM A SILICA SLIP, CASTING THE SLIP INTO A DESIRED SHAPE, SETTING THE SLIP AND DECANTING EXCESS WATER THEREFROM, DRYING THE CASTING AND SINTERING IT AT A TEMPERATURE SUFFICIENT TO FORM A RIGID POROUS SKELETON AND FUSING SAID SILICA FIBER AND SILICA POWDER AT LEAST IN PART ONE TO ANOTHER, AND THEREAFTER SUBSTANTIALLY COMPLETELY IMPREGNATING THE SKELETON WITH A THERMOSETTING SYNTHETIC RESIN HAVING INITIALLY A FLUID STATE TO PROVIDE A FINISHED MATERIAL HAVING A DENSITY IN THE RANGE OF ABOUT 1.35 GRAMS PER CUBIC CENTIMETER.
Claim 2
Dependent Claim
112 words
THE PROCESS OF MAKING AN ABLATION TYPE MATERIAL COMPRISING THE STEPS OF INTIMATELY MIXING SILICA IN POWDER AND COMMUNITED FIBER FORM, BLENDING THE MIXTURE WITH WATER TO FORM A SILICA SLIP, CASTING THE SLIP INTO A DESIRED SHAPE, SETTING THE SLIP AND DECANTING EXCESS WATER THEREFROM, DRYING THE CASTING AND SINTERING IT AT A TEMPERATURE SUFFICIENT TO FORM A RIGID POROUS SKELETON AND FUSING SAID SILICA FIBER AND SILICA POWDER AT LEAST IN PART ONE TO ANOTHER, AND THEREAFTER SUBSTANTIALLY COMPLETELY IMPREGNATING THE SKELETON WITH A THERMOSETTING SYNTHETIC RESIN HAVING INITIALLY A FLUID STATE TO PROVIDE A FINISHED MATERIAL HAVING A DENSITY IN THE RANGE OF ABOUT 1.35 GRAMS PER CUBIC CENTIMETER.
References Cited (Backward Citations)
US701708A
Cited
US2449249A
Cited
US2425891A
Cited
US2610957A
Cited
US2698251A
Cited
US2714556A
Cited
GB757890A
Cited
US2992124A
Cited
US2835107A
Cited
US2991267A
Cited
US2949375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |