US3845181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of porous ceramic materials through the use of foam attacking agents
Assignee: Foseco International Ltd
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Filing: 1972-12-29
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Granted: 1974-10-29
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Expires: 1992-12-29
Abstract
Abstract 1. IN THE METHOD OF MAKING A POROUS CERAMIC MATERIAL WHICH INCLUDES THE STEPS OF IMPREGNATING A BODY OF POLYURETHANE FOAM MATERIAL WITH A SLURRY OF FINELY DIVIDED CERAMIC MATERIAL, AND DRYING AND FIRING THE SO-IMPREGNATED BODY, THE IMPROVEMENT WHICH COMPRISES TREATING THE POLYURETHANE FOAM MATERIAL NO LATER THAN DURING IMPREGNATION OF THE FOAM WITH A FOAM ATTACKING AGENT SELECTED FROM THE CLASS CONSISTING OF GLYCOLS, LONG-CHAIN FATTY ACIDS AND ALKOXY DERIVATIVES OF AMINES.
Inventors
- 👤 F Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:33
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/06; C04B38/0615; Y; Y10; Y10S; Y10S521/00; Y10S521/918; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/24997
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE METHOD OF MAKING A POROUS CERAMIC MATERIAL WHICH INCLUDES THE STEPS OF IMPREGNATING A BODY OF POLYURETHANE FOAM MATERIAL WITH A SLURRY OF FINELY DIVIDED CERAMIC MATERIAL, AND DRYING AND FIRING THE SO-IMPREGNATED BODY, THE IMPROVEMENT WHICH COMPRISES TREATING THE POLYURETHANE FOAM MATERIAL NO LATER THAN DURING IMPREGNATION OF THE FOAM WITH A FOAM ATTACKING AGENT SELECTED FROM THE CLASS CONSISTING OF GLYCOLS, LONG-CHAIN FATTY ACIDS AND ALKOXY DERIVATIVES OF AMINES.
Claim 2
Dependent Claim
73 words
IN THE METHOD OF MAKING A POROUS CERAMIC MATERIAL WHICH INCLUDES THE STEPS OF IMPREGNATING A BODY OF POLYURETHANE FOAM MATERIAL WITH A SLURRY OF FINELY DIVIDED CERAMIC MATERIAL, AND DRYING AND FIRING THE SO-IMPREGNATED BODY, THE IMPROVEMENT WHICH COMPRISES TREATING THE POLYURETHANE FOAM MATERIAL NO LATER THAN DURING IMPREGNATION OF THE FOAM WITH A FOAM ATTACKING AGENT SELECTED FROM THE CLASS CONSISTING OF GLYCOLS, LONG-CHAIN FATTY ACIDS AND ALKOXY DERIVATIVES OF AMINES.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |