US4632794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing whisker preform for composite material
Assignee: Tokai Carbon Co Ltd
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Filing: 1983-12-08
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Granted: 1986-12-30
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Expires: 2003-12-08
Abstract
Abstract In a process for manufacturing a whisker preform for a composite material, a dispersion of a whisker in water or an organic solvent is passed through a sieve and is filtered, and a residual wet whisker cake is dried, with or without prior compression, to produce a cake having a desired density based upon the relationship between the weight of the whisker in the dispersion and the volume of the residual whisker cake after filtration.
Inventors
- 👤 Shigeto Mori
- 👤 Minoru Fukazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
C; C30; C30B; C30B33/00; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C22; C22C; C22C49/00; C22C49/02; C22C49/04; C30B29/00; C30B29/10; C30B29/36; C30B29/38; C30B29/60; C30B29/62; Y; Y10; Y10S; Y10S264/00; Y10S264/78
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
A process for manufacturing a whisker preform for a composite material having a density of 0.283-0.70 g/cm 3 , comprising the steps of: (1) compressing a whisker as a raw material consisting of SiC single crystals having a diameter of 0.1-5 μm and a length of 10-500 μm; (2) dispersing the compressed whisker in water or an organic solvent in the absence of a binder, the amount of the water or organic solvent being 7-200 times as much by weight as the amount of the whisker; (3) passing the resultant dispersion through a sieve having a mesh of 32-100; (4) filtering said dispersion; and (5) drying the residual wet whisker cake directly or after compression to said desired density.
Claim 2
Dependent Claim
119 words
A process for manufacturing a whisker preform for a composite material having a density of 0.283-0.70 g/cm 3 , comprising the steps of: (1) compressing a whisker as a raw material consisting of SiC single crystals having a diameter of 0.1-5 μm and a length of 10-500 μm; (2) dispersing the compressed whisker in water or an organic solvent in the absence of a binder, the amount of the water or organic solvent being 7-200 times as much by weight as the amount of the whisker; (3) passing the resultant dispersion through a sieve having a mesh of 32-100; (4) filtering said dispersion; and (5) drying the residual wet whisker cake directly or after compression to said desired density.
Claim 3
Dependent Claim
20 words
A process according to claim 1, wherein said whisker is dispersed in said water or organic solvent after being disentangled.
Claim 4
Dependent Claim
26 words
A process according to claim 1, wherein said whisker is dispersed in an organic solvent selected from the group consisting of alcohol, acetone, and an ether.
References Cited (Backward Citations)
US3275497A
Cited
US3476641A
Cited
GB1282096A
Cited
US3649406A
Cited
US3697634A
Cited
US3935060A
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US4313789A
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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) | 1989-12-29 | 1990-06-30 | 1990-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-29 | 1994-06-30 | 1994-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-29 | 1998-06-30 | 1998-12-30 | $7700.00 | Window Closed / Lapsed |