Patent US3859043A successfully refreshed from Google Patents.
US3859043A
Expired / Lapsed
US
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Treatments for improving the process and yield of carbon fibers obtained from the pyrolysis of rayon yarn
Assignee: United States Department of the Navy
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Filing: 1972-03-02
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Granted: 1975-01-07
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Expires: 1992-03-02
Abstract
Abstract A method of treating cellulosic yarn, prior to carbonization and graphitization, which comprises treating said yarn with either bis (chlorodiphenylphosphine) decaborane or dimeric chlorophospha (III)-o-carborane so that the cellulose reacts with these compounds.
Inventors
- 👤 James V Duffy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/16; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
39 words
A PROCESS FOR MODIFYING THE PROPERTIES OF CELLULOSIC YARN COMPRISING TREATING SAID YARN WITH A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BIS(CHLORODIPHENYLPHOSPHINE)DECABORNE AND DIMERIC CHLOROPHOSPHA (III)-OCARBORANE, IN ORDER TO REACT THE COMPOUND WITH THE YARN.
Claim 2
Dependent Claim
39 words
A PROCESS FOR MODIFYING THE PROPERTIES OF CELLULOSIC YARN COMPRISING TREATING SAID YARN WITH A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BIS(CHLORODIPHENYLPHOSPHINE)DECABORNE AND DIMERIC CHLOROPHOSPHA (III)-OCARBORANE, IN ORDER TO REACT THE COMPOUND WITH THE YARN.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein said solution comprises pyridine as the solvent for said compound.
Claim 4
Dependent Claim
29 words
A process according to claim 2 wherein said yarn is treated with said solution at a temperature from about room temperature up to the boiling point of said pyridine.
Claim 5
Dependent Claim
48 words
A process according to claim 3 wherein the amount of said compound present in said solution is from about two to three times the amount necessary to load said yarn with from about 15 to about 35 percent of said compound, based on the weight of said yarn.
Claim 6
Dependent Claim
11 words
A process according to claim 4 wherein said yarn is rayon.
Claim 7
Dependent Claim
12 words
A process according to claim 5 wherein said compound is bis(chlorodiphenylphosphine) decaborane.
Claim 8
Dependent Claim
13 words
A process according to claim 5 wherein said compound is dimeric chlorophospha (III)-o-carborane.
Claim 9
Dependent Claim
58 words
A process for modifying the properties of cellulosic yarn comprising: swelling the fibers of said yarn by mercerizing said yarn in a basic mercerizing solution; and then treating said yarn with a treating solution of a compound selected from the group consisting of bis(chlorodiphenylphosphine) decaborane and dimeric chlorophospha (III)-o-carborane, in order to react the compound with the yarn.
Claim 10
Dependent Claim
58 words
A process for modifying the properties of cellulosic yarn comprising: swelling the fibers of said yarn by mercerizing said yarn in a basic mercerizing solution; and then treating said yarn with a treating solution of a compound selected from the group consisting of bis(chlorodiphenylphosphine) decaborane and dimeric chlorophospha (III)-o-carborane, in order to react the compound with the yarn.
Claim 11
Dependent Claim
29 words
A process in accordance with claim 8 wherein said basic mercerizing solution comprises from about 1 to about 30 weight percEnt of an alkali metal or alkaline earth hydroxide.
Claim 12
Dependent Claim
24 words
A process in accordance with claim 9 wherein said standard basic mercerizing solution comprises from about 1 to about 6 percent of sodium hydroxide.
Claim 13
Dependent Claim
19 words
A process in accordance with claim 9 wherein said treating solution comprises pyridine as the solvent for said compound.
Claim 14
Dependent Claim
31 words
A process in accordance with claim 11 wherein said yarn is treated with said treating solution at a temperature from about room temperature up to the boiling point of said pyridine.
Claim 15
Dependent Claim
50 words
A process in accordance with claim 12 wherein the amount of said compound present in said treating solution is from about two to three times the amount necessary to load said yarn with from about 15 to about 35 percent of said compound, based on the weight of said yarn.
Claim 16
Dependent Claim
28 words
A process according to claim 13 wherein said yarn is rayon and said standard basic mercerizing comprises from about 1 to about 6 weight percent of sodium hydroxide.
Claim 17
Dependent Claim
12 words
A process according to claim 14 wherein said compound is bis(chlorodiphenylphosphine) decaborane.
Claim 18
Dependent Claim
13 words
A process according to claim 14 wherein said compound is dimeric chlorophospha (III)-o-carborane.
Claim 19
Dependent Claim
74 words
In a process for the graphitization of cellulosic yarn, the improvement which comprises subjecting said yarn to a treatment prior to graphitization, wherein said treatment comprises: swelling the fibers of said yarn by mercerizing said yarn in a basic mercerizing solution; and then treating said yarn with a treating solution of a compound selected from the group consisting of bis(chlorodiphenylphosphine) decaborne and dimeric chlorophospha (III)-o-carborane, in order to react the compound with the yarn.
Claim 20
Dependent Claim
74 words
In a process for the graphitization of cellulosic yarn, the improvement which comprises subjecting said yarn to a treatment prior to graphitization, wherein said treatment comprises: swelling the fibers of said yarn by mercerizing said yarn in a basic mercerizing solution; and then treating said yarn with a treating solution of a compound selected from the group consisting of bis(chlorodiphenylphosphine) decaborne and dimeric chlorophospha (III)-o-carborane, in order to react the compound with the yarn.
Claim 21
Dependent Claim
30 words
A process in accordance with claim 17 wherein said standard basic mercerizing solution comprises from about 1 to about 30 weight percent of an alkali metal or alkaline earth hydroxide.
Claim 22
Dependent Claim
24 words
A process in accordance with claim 18 wherein said standard basic mercerizing solution comprises from about 1 to about 6 percent of sodium hydroxide.
Claim 23
Dependent Claim
19 words
A process in accordance with claim 18 wherein said treating solution comprises pyridine as the solvent for said compound.
Claim 24
Dependent Claim
32 words
A process in accordance with claim 20 wherein said yarn is treated with said treating solution at a temperature of from about room temperature up to the boiling point of said pyridine.
Claim 25
Dependent Claim
50 words
A process in accordance with claim 21 wherein the amount of said compound present in said treating solution is from about two or three times the amount necessary to load said yarn with from about 15 to about 35 percent of said compound, based on the weight of said yarn.
Claim 26
Dependent Claim
28 words
A process according to claim 22 wherein said yarn is rayon and said standard basic mercerizing comprises from about 1 to about 6 weight percent of sodium hydroxide.
Claim 27
Dependent Claim
13 words
A process according to claim 23 wherein said compound is bis (chlorodiphenylphosphine) decaborane.
Claim 28
Dependent Claim
13 words
A process according to claim 23 wherein said compound is dimeric chlorophospha (III)-o-carborane.
Claim 29
Dependent Claim
53 words
The process of claim 23 wherein the treatment comprises mercerizing to swell the yarn for about 1 to 15 minutes, washing the yarn in water for about 15 to 35 minutes, soaking the yarn in pyridine to replace the water in the yarn with pyridine, and treating the yarn with the treating solution.
References Cited (Backward Citations)
US2743232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |