US3558344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonaceous coating for carbon foam
Assignee: United States Atomic Energy Commission
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Filing: 1968-04-19
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Granted: 1971-01-26
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Expires: 1988-04-19
Abstract
Abstract THE STRUCTURAL INTEGRITY OF HIGH- OR LOW-DENSITY CARBON FOAM IS IMPROVED BY PROVIDING THE LATTER WITH A PROTECTIVE CARBONACEOUS COATING. THE PROTECTIVE COATING IS PROVIDED BY APPLYING TO EXPOSED SURFACES OF A CARBON FOAM STRUCTURE A MIXTURE OF GRAPHITE FLOUR AND A THERMOPLASTIC RESIN DISSOLVED IN A SUITABLE SOLVENT. THE COATING MIXTURE IS DRIED AT A RELATIVELY LOW TEMPERATURE TO REMOVE EXCESS SOLVENT AND THEN HEATED TO A TEMPERATURE SUFFICIENT TO CARBONIZE THE RESIN AND FORM THE COATING.
Inventors
- 👤 George R Peterson
- 👤 Clifton E Stooksbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:39
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5001; C04B41/60; C04B41/61; C04B41/65; C04B41/80; C04B41/81; C04B41/85; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249987; Y10T428/249988; Y10T428/30
Claims Analysis
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |