US3720543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated porous ceramic article and method of making
Assignee: Corning Glass Works
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Filing: 1971-04-12
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Granted: 1973-03-13
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Expires: 1991-04-12
Abstract
Abstract A COMPOSITION FOR COATING A POROUS INORGANIC BODY TO PROMOTE WATER REPELLENCY WHILE MAINTAINING ITS FLAMEPROOF QUALITY CONSISTING ESSENTIALLLY OF AN AROMATIC OR ALIPHATIC HYDROGEN POLYSILOXANE AND COMBINATIONS THEREOF, AND A VOLATILE SOLVENT. UPON APPLICATION OF THE COMPOSITION TO SUCH A BODY, THE SOLVENT RAPIDLY EVAPORATES WHILE THE POLYSILOXANE CURES LEAVING A NONABLATIVE CERAMICPOLYSILOXANE MOLECULAR COMPLEX ON THE ENTIRE SURFACE OF THE POROUS BODY INCLUDING THE PORE DEFINING SURFACES OR WALLS WITHOUT PLUGGING THE PORES.
Inventors
- 👤 L Bockstie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:26
CPC Classifications
H; H01; H01C; H01C1/00; H01C1/02; H01C1/034; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249967; Y10T428/24997; Y10T428/26; Y10T428/31504; Y10T428/31551; Y10T428/31609; Y10T428/31612
Claims Analysis
Total Claims: 0
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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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |