US4798694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing composite materials
Assignee: Canon Inc
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Filing: 1986-08-06
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Granted: 1989-01-17
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Expires: 2006-08-06
Abstract
Abstract A molded composite material comprising a plural number of constituents is provided in which at least two of the constituents are distributed with a relative existing ratio varying at least in one direction in the composite material. A process for producing the composite material is also provided.
Inventors
- 👤 Hiroyuki Sugata
- 👤 Kouhei Nakata
- 👤 Nobutoshi Mizusawa
- 👤 Satoshi Yuasa
- 👤 Masahiro Haruta
- 👤 Takashi Hamamoto
- 👤 Kuniji Osabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:53
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/20; B22; B22F; B22F3/00; B22F3/02; B22F3/06; B28B1/008; B28B1/30; B29; B29C; B29C41/00; B29C41/02; B29C41/16; C; C03; C03B; C03B19/00; C03B19/04; C03B19/06; C03B19/12; C03B37/00; C03B37/01; C03B37/012; C03B37/0128; C03B37/01285; C03B37/014; C03B37/016; B22F2999/00; B29K; B29K2105/00; B29K2105/06; B29K2105/16; B29K2503/00; B29K2503/04; B29K2995/00; B29K2995/0037; B29K2995/0063; B29K2995/0064
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
162 words
A process for producing a composite material comprising: (a) mixing a plurality of different particulate constituents in a fluid to form a mixture, the mixing ratio of the different particulate constituents being varied over a period of time; (b) feeding the mixture into a central portion of a rotating molding vessel having an interior cavity and filter material aroung the circumference which allows for fluid communication between said interior cavity and the exterior of said molding vessel said feeding step taking place over said period of time to deposit said different particulate constituents in a ratio therebetween varying in the rotation radius direction and in correspondence with the mixing ratio; (c) applying a sufficient rotational speed to said molding vessel to applying a centrifugal force to said mixture to force the fluid from the particulate constituents and through said filter material; (d) controlling said rotational speed so as to vary the thickness of said layers; and (e) fixing the deposited particulate constituents.
Claim 2
Dependent Claim
162 words
A process for producing a composite material comprising: (a) mixing a plurality of different particulate constituents in a fluid to form a mixture, the mixing ratio of the different particulate constituents being varied over a period of time; (b) feeding the mixture into a central portion of a rotating molding vessel having an interior cavity and filter material aroung the circumference which allows for fluid communication between said interior cavity and the exterior of said molding vessel said feeding step taking place over said period of time to deposit said different particulate constituents in a ratio therebetween varying in the rotation radius direction and in correspondence with the mixing ratio; (c) applying a sufficient rotational speed to said molding vessel to applying a centrifugal force to said mixture to force the fluid from the particulate constituents and through said filter material; (d) controlling said rotational speed so as to vary the thickness of said layers; and (e) fixing the deposited particulate constituents.
Claim 3
Dependent Claim
17 words
A process for producing a composite material according to claim 1, wherein said fixing includes heat treatment.
Claim 4
Dependent Claim
25 words
A process for producing a composite material according to claim 1, including selecting the fluid from the group consisting of a liquid or a gas.
Claim 5
Dependent Claim
30 words
A process for producing a composite material according to claim 1, including varying continuously the ratio of at least two of said constituents in the radius direction of said rotation.
Claim 6
Dependent Claim
25 words
A process for producing a composite material according to claim 1, including employing a dispersing medium in forming said mixture in addition to said constituents.
Claim 7
Dependent Claim
21 words
A process for producing a composite material according to claim 1, including employing as one of the constituents, an inorganic material.
Claim 8
Dependent Claim
21 words
A process for producing a composite material according to claim 1, including employing as one of the constituents, an organic material.
Claim 9
Dependent Claim
20 words
A process for producing a composite material according to claim 1, including producing as the composite material a sintered product.
Claim 10
Dependent Claim
20 words
A process for producing a composite material according to claim 1, including producing as the composite material, an amorphous material.
Claim 11
Dependent Claim
20 words
A process for producing a composite material according to claim 1, including producing as the composite material, a crystalline material.
Claim 12
Dependent Claim
20 words
A process for producing a composite material according to claim 1, including producing as the composite material, a polymeric material.
Claim 13
Dependent Claim
22 words
A process for producing a composite material according to claim 1, including varying linearly and continuously the ratio of the composite material.
Claim 14
Dependent Claim
31 words
A process for producing a composite material according to claim 1, including forming the composite material as an optical material having a refractive index varying in at least one direction thereof.
Claim 15
Dependent Claim
30 words
A process for producing a composite material according to claim 1, further including causing a pressure difference to force the fluid from the particulate constituents and through said filter material.
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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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |