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US5456897A
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Fibril aggregates and method for making same
Assignee: Hyperion Catalysis International Inc
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Filing: 1994-08-02
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Granted: 1995-10-10
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Expires: 2014-08-02
Abstract
Abstract A fibril aggregate that includes a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, each of the fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat, and a method of preparing such aggregates.
Inventors
- 👤 David Moy
- 👤 Asif Chishti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:20
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/34; B01J21/00; B01J21/18; B01J23/70; B01J23/72; B01J23/74; B01J23/745; B01J23/75; B01J23/755; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/881; B01J35/00; B01J35/50; B01J35/58; B01J37/00; B01J37/02; B01J37/0201; B01J37/0207; B01J37/08; C; C01; C01B; C01B32/00; C01B32/05; H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/62; H01M4/624; H01M4/625; H01M4/64; H01M4/70; H01M4/80; H01M4/806; H01M4/86; H01M4/96; H01M6/00; H01M6/04; H01M6/06; H01M6/08; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
44 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, each of said fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat.
Claim 2
Dependent Claim
44 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, each of said fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat.
Claim 3
Dependent Claim
29 words
The fibril aggregate of claim 1 wherein the diameters of at least 90% of the individual fibrils in said aggregate have diameters that are between 3.5 and 75 nanometers.
Claim 4
Dependent Claim
26 words
The fibril aggregate of claim 1 wherein the diameters of substantially all of the individual fibrils in said aggregate are between 3.5 and 75 nanometers, inclusive.
Claim 5
Dependent Claim
32 words
The fibril aggregate of claim 1 wherein the diameter of said aggregate is between 0.05 and 50 μm, inclusive, and the length of said aggregate is between 0.1 and 1000 μm, inclusive.
Claim 6
Dependent Claim
27 words
The fibril aggregate of claim 1 wherein at least 90% of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
Claim 7
Dependent Claim
26 words
The fibril aggregate of claim 1 wherein substantially all of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
Claim 8
Dependent Claim
57 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, said fibrils automatically align into said relative orientation to form said aggregate, wherein each of said fibrils in said aggregate has graphitic layers substantially parallel to its longitudinal axis and is substantially free of a continuous thermal carbon overcoat.
Claim 9
Dependent Claim
57 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, said fibrils automatically align into said relative orientation to form said aggregate, wherein each of said fibrils in said aggregate has graphitic layers substantially parallel to its longitudinal axis and is substantially free of a continuous thermal carbon overcoat.
Claim 10
Dependent Claim
29 words
The fibril aggregate of claim 7 wherein the diameters of at least 90% of the individual fibrils in said aggregate have diameters that are between 3.5 and 75 nanometers.
Claim 11
Dependent Claim
26 words
The fibril aggregate of claim 7 wherein the diameters of substantially all of the individual fibrils in said aggregate are between 3.5 and 75 nanometers, inclusive.
Claim 12
Dependent Claim
32 words
The fibril aggregate of claim 7 wherein the diameter of said aggregate is between 0.05 and 50 μm, inclusive, and the length of said aggregate is between 0.1 and 1000 μm, inclusive.
Claim 13
Dependent Claim
27 words
The fibril aggregate of claim 7 wherein at least 90% of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
Claim 14
Dependent Claim
26 words
The fibril aggregate of claim 7 wherein substantially all of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
Claim 15
Dependent Claim
93 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, each of said fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat, wherein at least 90% of the individual fibrils in said aggregate have diameters that are between 3.5 and 75 nanometers, and wherein the diameter of said aggregate is between about 0.05 and 50 μm, inclusive, and the length of said aggregate is between about 0.1 and 1000 μm, inclusive.
Claim 16
Dependent Claim
93 words
A fibril aggregate comprising a multiplicity of carbon fibrils whose longitudinal axes have substantially the same relative orientation, each of said fibrils characterized as having graphitic layers that are substantially parallel to its longitudinal axis and being free of a continuous thermal carbon overcoat, wherein at least 90% of the individual fibrils in said aggregate have diameters that are between 3.5 and 75 nanometers, and wherein the diameter of said aggregate is between about 0.05 and 50 μm, inclusive, and the length of said aggregate is between about 0.1 and 1000 μm, inclusive.
Claim 17
Dependent Claim
27 words
The fibril aggregate of claim 13 wherein at least 90% of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
Claim 18
Dependent Claim
26 words
The fibril aggregate of claim 13 wherein substantially all of the individual fibrils in said aggregate have a length to diameter ratio of at least 5.
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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) | 1998-10-09 | 1999-04-10 | 1999-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-09 | 2003-04-10 | 2003-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-09 | 2007-04-10 | 2007-10-10 | $7700.00 | Window Closed / Lapsed |