Patents by Inventor Lawrence E. McAllister
Lawrence E. McAllister has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5167880Abstract: A method of finishing carbon fibers with phenolic triazine to promote adhesing of the carbon fibers with a resin matrix to retain up to 92% of the room temperature dry strength at a temperature of 500.degree. F.Type: GrantFiled: December 24, 1990Date of Patent: December 1, 1992Assignee: Allied-Signal Inc.Inventors: Brian P. Couch, Lawrence E. McAllister
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Patent number: 5143184Abstract: A carbon composite aircraft brake disc (10, 50, 60, 110, 120) is manufactured to include internally an insert member (12, 14, 18, 24, 28, 32, 36, 42, 52, 115, 125) which effects positive vibration damping for the disc (10, 50, 60, 110, 120) during operation of the brake (100). The insert member (12, 14, 18, 24, 28, 32, 36, 42, 52, 115, 125) may be a graphite material, paper, or cloth material which is introduced into the interior of material utilized for manufacturing the carbon composite aircraft disc (10, 50, 60, 110, 120). After manufacturing of the brake disc (10, 50, 60, 110, 120) is completed, the brake disc comprises a single integral carbon composite brake disc (10, 50, 60, 110, 120) having disposed completely internally therein the insert member which provides a discontinuity that effects efficiently positive vibration damping of the disc (10, 50, 60, 110, 120) during operation of the aircraft brake (100) in which the disc is located.Type: GrantFiled: February 14, 1991Date of Patent: September 1, 1992Assignee: Allied-Signal Inc.Inventors: David R. Snyder, Lawrence E. McAllister, Jaring V. Veen
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Patent number: 4837073Abstract: The invention provides a method for utilizing the inherent oxygen-blocking characteristics of a barrier coating for a carbon-carbon material by penetrating cracked, porous areas of the coating with an oxygen inhibitor. The inhibitor will complex with active carbon-carbon material sites at the base of the cracks. The resulting system provides very effective oxidation protection at intermediate temperatures of approximately 650.degree. C.Type: GrantFiled: March 30, 1987Date of Patent: June 6, 1989Assignee: Allied-Signal Inc.Inventors: Lawrence E. McAllister, Norman E. Jannasch
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Patent number: 4656095Abstract: In a coating composition for application to a substrate for curing thereon to form an ablative coating of the type including a reactive mixture of epoxy and polysulfide resins, an amine curing agent, and inorganic materials serving as a source of one or more Lewis acids and being capable of forming a glassy reaction product when exposed to heat, the improvement comprising adding carbonaceous pre-ox fibers thereto in a weight amount between about 15 to 40%. When applied to a substrate, the solvent-free composition cures to a tightly adhering, flexible coating capable of providing thermal protection in a very high temperature, erosive environment.Type: GrantFiled: May 31, 1984Date of Patent: April 7, 1987Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, John E. Hill, Jr.
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Patent number: 4595714Abstract: A coating composition for application to a substrate for curing thereon to form an ablative coating. The composition comprises a reactive mixture of epoxy and polysulfide resins, an amine curing agent, refractory fibers and inorganic materials serving as a source of one or more Lewis acids and being capable of forming a glassy reaction product when exposed to heat. When applied to a substrate, the solvent-free composition cures to a tightly adhering, flexible coating capable of providing thermal protection in a very high-temperature, erosive environment.Type: GrantFiled: March 13, 1981Date of Patent: June 17, 1986Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, Herbert Dietrich, John E. Hill, Jr.
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Patent number: 4471089Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.Type: GrantFiled: December 27, 1982Date of Patent: September 11, 1984Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, Herbert Dietrich
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Patent number: 4409361Abstract: A novel polymer is provided as the condensation reaction product of a non-aqueous mixture of a phenol and an aldehyde in a molar ratio of about 0.5 to 1 phenol to aldehyde, containing refractory fibers, such as carbon, graphite, silica, having an aspect and metal oxides and silicates, which fibers have an aspect ratio of about 10. The phenol is selected from metacresol, orthocresol, 3,5-dimethylphenol, resorcinol and substituted resorcinols, the preferred material being mostly resorcinol. The aldehyde is selected from furfural and mixtures of furfural and paraformaldehyde. The condensation polymerization reaction can be effected by adding an acid catalyst to the mixture or by employing a curing agent which provided a polyfunctional amine reactive with either or both the aldehyde and the phenol.Type: GrantFiled: November 4, 1981Date of Patent: October 11, 1983Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, Herbert Dietrich
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Patent number: 4309527Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.Type: GrantFiled: February 9, 1981Date of Patent: January 5, 1982Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, Herbert Dietrich
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Patent number: 4275170Abstract: Flame retardant polymer resins formed by an acid condensation reaction from a mixture of resorcinol and furfural with a molar excess of the aldehyde. In one particular embodiment the resin is formed of a mixture of two prepolymer solutions with at least a boric acid catalyst, one or both of the prepolymer solutions being an acid-condensation reaction product of resorcinol and furfural with excess aldehyde functionality, or one of the prepolymers being a mix of substantially unreacted resorcinol and furfural with a slight molar excess of aldehyde.Type: GrantFiled: September 7, 1979Date of Patent: June 23, 1981Assignee: Fiber Materials, Inc.Inventors: Lawrence E. McAllister, Herbert Dietrich