Patent US4876078A successfully refreshed from Google Patents.
US4876078A
Expired / Lapsed
US
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Process for preparing carbon fibers in gas phase growth
Assignee: Nikkiso Co Ltd
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Filing: 1987-07-06
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Granted: 1989-10-24
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Expires: 2007-07-06
Abstract
Abstract An improved process for preparing carbon fibers in a gaseous phase reaction comprising introducing a gas mixture comprising at least one carbon compound, at least one inorganic transition metal compound gas and at least one carrier gas into a reactor and subjecting the mixture to a temperature of 600° C. to 1300° C. in the reactor for inducing growth of carbon fibers.
Inventors
- 👤 Kohei Arakawa
- 👤 Takashi Ohsaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:30
CPC Classifications
B; B82; B82Y; B82Y30/00; D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/127; D01F9/1271; D01F9/1272; D01F9/1273; D01F9/1275; D01F9/1276; D01F9/1278
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
68 words
In a process for preparing carbon fibers in a gaseous phase reaction, the improvement comprising introducing a gas mixture comprising at least one carbon compound, at least one inorganic transition metal compound gas and at least one carrier gas into a reactor and subjecting said mixture to a temperature of 600° C. to 1300° C. in said reactor for inducing growth of carbon fibers without using any substrate.
Claim 2
Dependent Claim
68 words
In a process for preparing carbon fibers in a gaseous phase reaction, the improvement comprising introducing a gas mixture comprising at least one carbon compound, at least one inorganic transition metal compound gas and at least one carrier gas into a reactor and subjecting said mixture to a temperature of 600° C. to 1300° C. in said reactor for inducing growth of carbon fibers without using any substrate.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the inorganic transition metal compound is an inorganic iron compound.
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |