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US3791847A Expired / Lapsed US ⏱️ 0.0 years remaining

Process for the production of incombustible carbonaceous material

Assignee: Kureha Corp
•
Filing: 1971-07-26
•
Granted: 1974-02-12
•
Expires: 1991-07-26
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Abstract

Abstract A carbonaceous material is obtained by bringing a mixture of one or more substances selected from the group consisting of molecular phosphorus, inorganic phosphorus-containing compounds and organic phosphorus-containing compounds and organic compounds into contact with a substrate heated at a temperature of 600*1,500*C thereby depositing the resulting carbon formed by pyrolysis on the substrate. Alternatively, an organic phosphoruscontaining aromatic compound is brought into contact with a substrate heated at a temperature of 600*-1,500*C thereby depositing the resulting carbon formed by pyrolysis on the substrate. A shaped article coated with said carbonaceous material is obtained by effecting such pyrolysis and deposition on a shaped article made of metal, ceramics glass or carbon. The carbonaceous materials obtained according to this invention are composed of 80-99.9% of carbon and 0.1-20% of phosphorus and are imcombustible having excellent oxidation-resisting properties in addition to the intrinsic properties of carbon.

Inventors

  • 👤 T Araki
  • 👤 K Asano
  • 👤 J Koshugi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 16:49
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C01; C01B; C01B32/00; Y; Y10; Y10T; Y10T428/00; Y10T428/30; Y10T428/31504; Y10T428/31678

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 17 words
The process of claim 1 wherein said solid substrate temperature is maintained at a temperature of 600*-1,500*C.
Claim 2
Dependent Claim 9 words
The product formed by the process of claim 1.
Claim 3
Dependent Claim 21 words
The product of claim 1 wherein said coating of phosphorus-containing carbon contains 0.1-20% by weight phosphorus and 80-99.9% by weight carbon.
Claim 4
Dependent Claim 76 words
A process for the production of oxidation-resistant carbon comprising: vaporizing a polycyclic aromatic phosphorus-containing compound, or a mixture of phosphorus or a phosphorus compound and a polycyclic aromatic organic compound, said phosphorus-containing compound or said mixture being capable of undergoing vapor phase pyrolysis; and contacting the vapor with a solid substrate having a temperature sufficient to effect pyrolysis of the vapor whereby said vapor is pyrolized to form a coating of phosphorus-containing carbon on said substrate.
Claim 5
Dependent Claim 28 words
The process of claim 5 wherein said polycyclic organic compound is selected from naphthalene, tetralin, decalin, indene, indane, acenaphthene, fluorene, anthracene, phenanthrene, pyrene, naphthacene, chrysene, triphenylene, and perylene.
Claim 6
Dependent Claim 19 words
The process of claim 5 wherein said polycyclic aromatic phosphorus-containing compound is selected from triphenyl phosphine and triphenyl phosphate.
Claim 7
Dependent Claim 17 words
The process of claim 5 wherein said vapor is diluted with an inert gas prior to pyrolysis.
Claim 8
Dependent Claim 20 words
The process of claim 5 wherein said phosphorus or phosphorus compound constitutes 20% by volume or less of said mixture.
Claim 9
Dependent Claim 23 words
The process of claim 5 where said polycyclic aromatic organic compound or said polycyclic aromatic phosphorus-containing compound has two or more condensed rings.
Claim 10
Dependent Claim 17 words
The process of claim 5 wherein said solid substrate temperature is maintained at a temperature of 600*-1,500*C.
Claim 11
Dependent Claim 19 words
The process of claim 11 wherein said pyrolysis is performed for a period of 1 second to 10 hours.
Claim 12
Dependent Claim 13 words
The process of claim 11 wherein said substrate is metal, glass or carbon.

References Cited (Backward Citations)

US1856756A Cited
US1895063A Cited
US2736642A Cited
US3157541A Cited
US3512932A Cited
US3427120A Cited
US3335094A Cited
US3652221A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-11 1977-08-13 1978-02-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-11 1981-08-13 1982-02-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-11 1985-08-13 1986-02-12 $7700.00 Window Closed / Lapsed

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