Carbon fibers having improved strength and modulus and an associated method and apparatus for preparing same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 1, 2015
Issued Date -
N/A
app pub date -
Oct 7, 2014
filing date -
Nov 22, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention is directed to carbon fibers having high tensile strength and modulus of elasticity. The invention also provides a method and apparatus for making the carbon fibers. The method comprises advancing a precursor fiber through an oxidation oven wherein the fiber is subjected to controlled stretching in an oxidizing atmosphere in which tension loads are distributed amongst a plurality of passes through the oxidation oven, which permits higher cumulative stretches to be achieved. The method also includes subjecting the fiber to controlled stretching in two or more of the passes that is sufficient to cause the fiber to undergo one or more transitions in each of the two or more passes. The invention is also directed to an oxidation oven having a plurality of cooperating drive rolls in series that can be driven independently of each other so that the amount of stretch applied to the oven in each of the plurality of passes can be independently controlled.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- C01B Class
- 1554 Applications Filed
- 1323 Patents Issued To-Date
- 85.14 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 7 Citation Count
- C01B Class
- 18.77 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 1, 2027 |
