US3880969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing an open-celled aromic foam
Assignee: Universal Oil Products Co
•
Filing: 1973-11-05
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Granted: 1975-04-29
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Expires: 1993-11-05
Abstract
Abstract Ceramic foam is prepared by a method which comprises curing a thermoset resin-ceramic mixture, firing the mixture, and sintering, the improvement in said method comprising firing said mixture in a container which is enclosed on the sides and the bottom whereby an open-celled structure is produced.
Inventors
- 👤 Edwin J Latos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:49
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; C04B38/062
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A PROCESS FOR PREPARING A CERAMIC FOAM WHICH COMPRISES FIRING A CURED THERMOSET RESIN-CERAMIC MIXTURE AT A TEMPERATURE OF FROM ABOUT 1,000*C. TO ABOUT 1,500*C. IN A CONTAINER WHICH IS OPEN AT THE TOP AND ENCLOSED ON ALL SIDES AND THE BOTTOM, ALLOWING THE GASES GENERATED FROM THE THERMAL DEGRADATION AND COMBUSTION OF SAID MIXTURE TO RISE THROUGH THE MIXTURE AND ESCAPE THROUGH THE OPEN-ENDED TOP OF THE CONTAINER, THEREBY CREATING AN OPEN-CELLED STRUCTURE, SINTERING THE THUS FIRED RESIN-CERAMIC MIXTURE IS A TEMPERATURE OF FROM ABOUT 1,350*C. TO ABOUT 1,450*C., AND RECOVERING THE RESULTANT CERAMIC FOAM.
Claim 2
Dependent Claim
96 words
A PROCESS FOR PREPARING A CERAMIC FOAM WHICH COMPRISES FIRING A CURED THERMOSET RESIN-CERAMIC MIXTURE AT A TEMPERATURE OF FROM ABOUT 1,000*C. TO ABOUT 1,500*C. IN A CONTAINER WHICH IS OPEN AT THE TOP AND ENCLOSED ON ALL SIDES AND THE BOTTOM, ALLOWING THE GASES GENERATED FROM THE THERMAL DEGRADATION AND COMBUSTION OF SAID MIXTURE TO RISE THROUGH THE MIXTURE AND ESCAPE THROUGH THE OPEN-ENDED TOP OF THE CONTAINER, THEREBY CREATING AN OPEN-CELLED STRUCTURE, SINTERING THE THUS FIRED RESIN-CERAMIC MIXTURE IS A TEMPERATURE OF FROM ABOUT 1,350*C. TO ABOUT 1,450*C., AND RECOVERING THE RESULTANT CERAMIC FOAM.
Claim 3
Dependent Claim
16 words
The process of claim 1 further characterized in that the resultant ceramic foam is a cordierite.
Claim 4
Dependent Claim
25 words
The process of claim 1 further characterized in that the thermoset resin-ceramic mixture comprises a polyester resin and a mixture of alumina, silica and talc.
Claim 5
Dependent Claim
25 words
The process of claim 1 further characterized in that the thermoset resin-ceramic mixture comprises a polyester resin and a mixture of alumina, silica and magnesia.
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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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |