US3852428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon fibres
Assignee: Coal Industry Patents Ltd
•
Filing: 1971-08-24
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Granted: 1974-12-03
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Expires: 1991-08-24
Abstract
Abstract The invention relates to an improvement in a process for the production of carbon fibre (also filaments and films) from organic material consisting mainly of hydrocarbons (e.g. pitch, tars, solutions or extracts of coal). The organic material is spun or extruded to form a fibre, oxidised to stabilise it to heat treatment and subsequently carbonised. The invention comprises employing as an additive in the organic material from 0.05 percent to 30 percent by weight of one or more polymers compatible with the organic material and thoroughly mixed therewith, provided that if the polymer is aromatic, it has a molecular weight of above 5000. Typical polymers include vinyl chloride polymers, vinyl acetate polymers, polymethacrylates, and polypropylenes.
Inventors
- 👤 J Powell
- 👤 P Winter
- 👤 E Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:41
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/32; D01F9/322; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0481; D01F9/145; D01F9/15; D01F9/20; D01F9/21; D01F9/22; D06; D06B; D06B3/00; D06B3/10; D06B2700/00; D06B2700/09
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
IN A PROCESS FOR THE PRODUCTION OF FIBERS, FILAMENTS OR FILMS CONSISTING ESSENTIALLY OF CARBON BY SPINNING OR EXTRUDING ORGANIC MATERIAL CONSISTING MAINLY OF HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF AN EXTRACT OF COAL, PITCH FROM COAL, TAR FROM COAL AND A BITUMEN TO FORM A FIBER FILAMENT OR FILM OF SAID ORGANIC MATERIAL; OXIDIZING THE FIBER, FILAMENT OR FILM WHEREBY THE SPUN OR EXTRUDED FIBER, FILAMENT OR FILM IS STABILIZED TO HEAT TREATMENT AND CARBONIZING THE STABILIZED FIBER, FILAMENT OR FILM WHEREEBY A FIBER, FILAMENT OR FILM CONSISTING ESSENTIALLY OF CARBON IS FORMED; THE IMPROVEMENT WHEREBY THE SAID ORGANIC MATERIAL SPUN OR EXTRUDED CONSISTING OF HYDROCARBONS CONTAINS AS AN ADDITIVE THOROUGHLY DISSOLVED OR DISPERSED IN SAID ORGANIC MATERIAL FROM 0.05 TO 30 PERCENT BY WEIGHT OF ONE OR MORE POLYMERS COMPATIBLE WITH SAID ORGANIC MATERIAL AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE AND POLYMETHYLMETHACRYLATE.
Claim 2
Dependent Claim
148 words
IN A PROCESS FOR THE PRODUCTION OF FIBERS, FILAMENTS OR FILMS CONSISTING ESSENTIALLY OF CARBON BY SPINNING OR EXTRUDING ORGANIC MATERIAL CONSISTING MAINLY OF HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF AN EXTRACT OF COAL, PITCH FROM COAL, TAR FROM COAL AND A BITUMEN TO FORM A FIBER FILAMENT OR FILM OF SAID ORGANIC MATERIAL; OXIDIZING THE FIBER, FILAMENT OR FILM WHEREBY THE SPUN OR EXTRUDED FIBER, FILAMENT OR FILM IS STABILIZED TO HEAT TREATMENT AND CARBONIZING THE STABILIZED FIBER, FILAMENT OR FILM WHEREEBY A FIBER, FILAMENT OR FILM CONSISTING ESSENTIALLY OF CARBON IS FORMED; THE IMPROVEMENT WHEREBY THE SAID ORGANIC MATERIAL SPUN OR EXTRUDED CONSISTING OF HYDROCARBONS CONTAINS AS AN ADDITIVE THOROUGHLY DISSOLVED OR DISPERSED IN SAID ORGANIC MATERIAL FROM 0.05 TO 30 PERCENT BY WEIGHT OF ONE OR MORE POLYMERS COMPATIBLE WITH SAID ORGANIC MATERIAL AND BEING SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE AND POLYMETHYLMETHACRYLATE.
Claim 3
Dependent Claim
18 words
The process of claim 1, wherein the polymer has at least 50 percent of its monomers of methylmethacrylate.
Claim 4
Dependent Claim
18 words
The process of claim 1, wherein the polymer has at least 75 percent of its monomers of methylmethacrylate.
Claim 5
Dependent Claim
16 words
The process of claim 1, wherein the polymer has as the monomer or monomers thereof propylene.
References Cited (Backward Citations)
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US3392216A
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US3529934A
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US3576907A
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US3639953A
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US3723609A
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US3607672A
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US3784679A
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |