US3736159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composites having low thermal expansion
Assignee: McDonnell Douglas Corp
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Filing: 1970-03-02
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Granted: 1973-05-29
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Expires: 1990-03-02
Abstract
Abstract PROCESS WHEREIN SHORT LENGTHS OF FIBERS, E.G. GRAPHITE FIBERS, EXTREMELY SMALL PARTICLES OF A REFRACTORY METAL COMPOUND, E.G. NBC OF 0.02 MICRON PARTICLE SIZE, AND LIQUID, E.G. WATER, TO MAKE A SLURRY, ARE THOROUGHLY MIXED TOGETHER, THE LIQUID E.G. WATER IS THEN REMOVED FROM THE SLURRY, LEAVING A SLURRY RESIDUE WHICH CAN BE FORMED TO THE DESIRED SHAPE AS BY PRESSING AND FINALLY HEAT TREATED AT VERY HIGH TEMPERATURES, E.G. 3000*C., TO FORM A COMPOSITE WITH FIBRES, E.G. GRAPHITE FIBERS, DISPERSED IN A MATRIX OF REFRACTORY METAL COMPOUND, E.G. NBC. A COMPOSITE PRODUCED BY THE ABOVE PROCESS.
Inventors
- 👤 J Gibson
- 👤 R Schumacher
- 👤 K Myler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/486; C04B35/488; C04B35/51; C04B35/515; C04B35/52; C04B35/522; C04B35/547; C04B35/56; C04B35/5607; C04B35/5622; C04B35/5626; C04B35/563; C04B35/58; C04B35/58007; C04B35/58014; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/58085; C04B35/58092; C04B35/622; C04B35/64; C04B35/645; C04B35/71; C04B35/78; C04B35/80; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/38; C04B2235/3804; C04B2235/3813; C04B2235/3817; C04B2235/3839; C04B2235/3843; C04B2235/3852; C04B2235/386; C04B2235/3891; C04B2235/40; C04B2235/404; C04B2235/48; C04B2235/50; C04B2235/52; C04B2235/5208; C04B2235/5212; C04B2235/5216; C04B2235/524; C04B2235/5248; C04B2235/526; C04B2235/5264; C04B2235/54; C04B2235/5418; C04B2235/5436; C04B2235/5445; C04B2235/5454; C04B2235/70; C04B2235/96; C04B2235/9607; Y; Y10; Y10S; Y10S264/00; Y10S264/19
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |