US3131239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing porous barriers
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1958-04-24
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Granted: 1964-04-28
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Expires: 1978-04-24
Abstract
No abstract record available.
Inventors
- 👤 Calis Micheline
- 👤 Charpin Jean Edouard
- 👤 Plurien Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:53
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/0038; B; B01; B01D; B01D59/00; B01D59/10; B01D59/12; B01D59/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A METHOD OF MANUFACTURING A POROUS BARRIER WHICH COMPRISES MIXING TOGETHER INTO A PASTE A THIXOTROPIC BINDER AND A POWDER OF AT LEAST ONE METAL OXIDE OF THE GROUP CONSISTING OF ALUMINA, TITANIM OXIDE AND MAGNESIA, THE MEAN RADIUS OF THE GRAINS OF SAID POWDER BEING LESS THAN ONE MICRON, SHAPING THIS PASTE INTO A TUBE THE WALL THICKNESS OF WHICH IS APPROXIMATELY 1 MILLIMETER, AND HEATING SAID ELEMENT, THIS HEATING BEING CONDUCTED IN TWO STEPS, TO WIT, A FIRST ONE AT A TEMPERATURE JUST SUFFICIENT TO ENSURE A SLOW EVACUATION OF SAID BINDER WITHOUT CRACKING OF THE TUBE AND A SECOND ONE AT A TEMPERATURE RANGING FROM 700 TO 1400*C. AND CHOSEN SUCH AS TO OBTAIN JUST A SURFACE JOINING OF THE GRAINS IN CONTACT WITH ONE ANOTHER.
Claim 2
Independent Claim
129 words
A METHOD OF MANUFACTURING A POROUS BARRIER WHICH COMPRISES MIXING TOGETHER INTO A PASTE A THIXOTROPIC BINDER AND A POWDER OF AT LEAST ONE METAL OXIDE OF THE GROUP CONSISTING OF ALUMINA, TITANIM OXIDE AND MAGNESIA, THE MEAN RADIUS OF THE GRAINS OF SAID POWDER BEING LESS THAN ONE MICRON, SHAPING THIS PASTE INTO A TUBE THE WALL THICKNESS OF WHICH IS APPROXIMATELY 1 MILLIMETER, AND HEATING SAID ELEMENT, THIS HEATING BEING CONDUCTED IN TWO STEPS, TO WIT, A FIRST ONE AT A TEMPERATURE JUST SUFFICIENT TO ENSURE A SLOW EVACUATION OF SAID BINDER WITHOUT CRACKING OF THE TUBE AND A SECOND ONE AT A TEMPERATURE RANGING FROM 700 TO 1400*C. AND CHOSEN SUCH AS TO OBTAIN JUST A SURFACE JOINING OF THE GRAINS IN CONTACT WITH ONE ANOTHER.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |