US3666526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory porous bodies
Assignee: General Electric Co
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Filing: 1966-01-06
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Granted: 1972-05-30
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Expires: 1986-01-06
Abstract
Abstract POROUS BODIES OF INTERCONNECTED CELLULAR STRUCTURE HAVING EXTREMELY HIGH STRENGTH-TO-WEIGHT RATIOS AT ELEVATED TEMPERATURES. THE POROUS BODIES HAVE A FOAM SUBSTRATE OF UNIFORM CELL STRUCTURE, PRODUCED BY THE THERMAL DECOMPOSITION OF AN ORGANIC FOAM, AND A REFRACTORY COATING ON THE SUBSTRATE OF A VAPOR-DEPOSITED PYROLYTIC MATERIAL.
Inventors
- 👤 Bruce L Ettinger
- 👤 Samuel M Wolosin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:53
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B35/00; C04B35/515; C04B35/52; C04B35/522; C04B41/009; C04B41/45; C04B41/50; C04B41/5001; C04B41/51; C04B41/5133; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249967
Claims Analysis
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |