US3309434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the fabrication of bodies formed by dispersion of refractory material within a pyrocarbon matrix which is impervious to gases
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1964-10-06
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Granted: 1967-03-14
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Expires: 1984-10-06
Abstract
No abstract record available.
Inventors
- 👤 Blum Pierre
- 👤 Bochirol Louis
- 👤 Moreau Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:07
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C04B35/01; C04B35/48; C04B35/486; C04B35/488; C04B35/51; C04B35/5156; C04B35/5158; C04B35/521; C04B35/56; C04B35/58; C04B35/622; C04B35/62204; C04B35/62213; C04B35/626; C04B35/63; C04B35/632; C04B35/636; C04B35/6365; C04B41/00; C04B41/45; C04B41/50; C04B41/5001; C04B41/80; C04B41/81; C04B41/85; G; G21; G21C; G21C3/00; G21C3/42; G21C3/58; G21C3/62; G21C3/64; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S264/00; Y10S264/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PROCESS FOR THE FABRICATION OF AN ARTICLE FORMED BY DISPERSION OF A REFRACTORY MATERIAL WITHIN A CARBONACEOUS MATRIX WHICH IS IMPERVIOUS TO GASES, THE STAGES WHICH CONSIST IN MIXING WITH A POWDER CONTAINING SAID REFRACTORY MATERIAL AND HAVING A PARTICLE SIZE WHICH IS PREFERABLY SMALLER THAN 400U AT LEAST ONE BINDER WHICH IS CHOSEN FROM THE GROUP CONSISTING OF POLYSACCHARIDES, GUMS, MUCILAGES, STARCHES AND ALGINATES WHICH ARE DISPERSED IN WATER TO FORM A PASTE, PRESSING SAID PASTE INTO A COMPACT COHESIVE ARTICLE, REMOVING THE WATER, AND THEN IMPREGNATING AND SEALING SAID COMPACT WITH CARBON AND FORMING SAID MATRIX BY MAINTAINING SAID ARTICLE IN A GASEOUS HYDROCARBON ATMOSPHERE AT A TEMPERATURE WITHIN THE RANGE OF 800 TO 1,000*C.
Claim 2
Dependent Claim
119 words
IN A PROCESS FOR THE FABRICATION OF AN ARTICLE FORMED BY DISPERSION OF A REFRACTORY MATERIAL WITHIN A CARBONACEOUS MATRIX WHICH IS IMPERVIOUS TO GASES, THE STAGES WHICH CONSIST IN MIXING WITH A POWDER CONTAINING SAID REFRACTORY MATERIAL AND HAVING A PARTICLE SIZE WHICH IS PREFERABLY SMALLER THAN 400U AT LEAST ONE BINDER WHICH IS CHOSEN FROM THE GROUP CONSISTING OF POLYSACCHARIDES, GUMS, MUCILAGES, STARCHES AND ALGINATES WHICH ARE DISPERSED IN WATER TO FORM A PASTE, PRESSING SAID PASTE INTO A COMPACT COHESIVE ARTICLE, REMOVING THE WATER, AND THEN IMPREGNATING AND SEALING SAID COMPACT WITH CARBON AND FORMING SAID MATRIX BY MAINTAINING SAID ARTICLE IN A GASEOUS HYDROCARBON ATMOSPHERE AT A TEMPERATURE WITHIN THE RANGE OF 800 TO 1,000*C.
References Cited (Backward Citations)
US3079316A
Cited
US3166614A
Cited
US3164487A
Cited
US3212989A
Cited
US3158547A
Cited
US3135665A
Cited
US3122595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |