Patents by Inventor Bruce A. Reinhardt
Bruce A. Reinhardt 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).
-
Patent number: 6730793Abstract: Provided are chromophores of the formula Q—(—L—Z)x, wherein x is 2 or 3, wherein Q is selected from the group consisting of wherein L is wherein R is an alkyl group having 1 to 20 carbon atoms, and wherein Z is selected from the group consisting ofType: GrantFiled: June 13, 2002Date of Patent: May 4, 2004Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Ramamurthi Kannan, Loon-Seng Tan, Bruce A. Reinhardt, Richard A. Vaia
-
Patent number: 6300502Abstract: Provided are chromophores with very large two-photon absorption cross-sections. One group of these chromophores has the formula: (T—Q)n—N—Phm wherein Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-3 and m has a value of 3−n, and wherein T is wherein R1 and R2 are alkyl groups having 1 to 20 carbon atoms, provided that when Q is a single bond, the value of n is 2 or 3. Another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as defined above, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-4 and m has a value of 4−n, and wherein G is a 4-arm core unit. Yet another group of these chromophores has the formula: (T—Q)n—G—Phm wherein T is as described previously, Q is a single bond or 1,4-phenylene, Ph is a phenyl group, n has a value of 1-6 and m has a value of 6−n, and wherein G is a 6-arm core unit.Type: GrantFiled: December 8, 2000Date of Patent: October 9, 2001Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Ramamurthi Kannan, Bruce A. Reinhardt, Loon-Seng Tan
-
Patent number: 6111641Abstract: The purpose of the nonlinear spectrophotometer is to provide a simple instrument that can be used on a routine basis to accurately measure the two-photon absorption (TPA) coefficient and cross-section on a wide variety of materials. The instrument is capable of measuring: (1) both organic and inorganic materials, (2) solutions and thin film materials forms, and (3) materials which are fluorescent and nonfluorescent.Type: GrantFiled: March 23, 1998Date of Patent: August 29, 2000Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Anadi Mukherjee, Nandini Mukherjee, Conrad S. Sarvis, Bruce A. Reinhardt
-
Patent number: 6100405Abstract: There are provided asymmetrical two-photon chromophores of the formula:D--Ar--Awherein Ar is selected from the group consisting of ##STR1## wherein Fl is a fluorene group of the formula: ##STR2## wherein R.sub.1 and R.sub.2 are alkyl groups having 2 to 20 carbon atoms, and wherein R.sub.1 and R.sub.2 are the same or different;wherein D is ##STR3## wherein Q is selected from the group consisting of --H, --OH and --O--C.sub.x H.sub.2x+1, wherein x has a value of 1 to 10;and wherein A is selected from the group consisting of ##STR4## wherein Z is selected from the group consisting of --O-- and --S--.Type: GrantFiled: June 15, 1999Date of Patent: August 8, 2000Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, deceased, by Erin D. Reinhardt, administrator, by Jason A. Reinhardt, administrator, Ramamurthi Kannan
-
Patent number: 5991021Abstract: The purpose of the nonlinear spectrophotometer is to provide a simple instrument that can be used on a routine basis to accurately measure the two-photon absorption (TPA) coefficient and cross-section on a wide variety of materials. The instrument is capable of measuring: (1) both organic and inorganic materials, (2) solutions and thin film materials forms, and (3) materials which are fluorescent and nonfluorescent.Type: GrantFiled: February 1, 1999Date of Patent: November 23, 1999Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Anadi Mukherjee, Nandini Mukherjee, Conrad S. Sarvis, Bruce A. Reinhardt
-
Patent number: 5859251Abstract: A two-photon absorbing chromophore of the formulaE--Ar--Ewherein the Ar core is selected from the group consisting of ##STR1## wherein R.sub.1 and R.sub.2 are alkyl groups having 8 to 12 carbon atoms, and wherein R.sub.1 and R.sub.Type: GrantFiled: September 18, 1997Date of Patent: January 12, 1999Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Ramamurthi Kannan, Lawrence L. Brott, Stephen J. Clarson
-
Patent number: 5770737Abstract: A two-photon absorbing chromophore of the formulaD--Ar--Awherein Ar is selected from the group consisting of ##STR1## D is selected from the group consisting of ##STR2## and A is selected from the group consisting of ##STR3## wherein R.sub.1 and R.sub.2 are alkyl groups having 8 to 12 carbon atoms, and wherein R.sub.1 and R.sub.2 are the same or different.Type: GrantFiled: September 18, 1997Date of Patent: June 23, 1998Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Jayprakash C. Bhatt, Lawrence L. Brott, Stephen J. Clarson
-
Patent number: 5594075Abstract: The compound 2-ethynyl-5-(4-pyridyl)ethynyl thiophene: ##STR1## when incorporated into a thermoplastic polymer having repeating units of the formula: ##STR2## wherein X is --O-- or --S--, and R is selected from the group consisting of: ##STR3## and Ar is selected from the group consisting of: ##STR4## wherein X is as previously defined, poled to align the molecules and cured to crosslink at least the terminal acetylenic groups, has second-order nonlinear optical activity.Type: GrantFiled: August 7, 1995Date of Patent: January 14, 1997Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Jayprakash C. Bhatt
-
Patent number: 4931532Abstract: There is provided an aromatic benzoxazole polymer having repeating units of the formula ##STR1## wherein Ar is ##STR2## wherein R is an alkyl group having 8 to 12 carbon atoms. The polymers of this invention are prepared by the polycondensation of 4,4'-hexafluoroisopropylidene bis(2-aminophenol) with a dicarboxylic acid selected from the group consisting of isophthalic acid, terephthalic acid, 2,5-pyridine dicarboxylic acid, 2,6-pyridine dicarboxylic acid and a 2,5-bis(alkoxy) terephthalic acid of the formula ##STR3## wherein R is an alkyl group having 8 to 12 carbon atoms, in a suitable reaction medium containing a suitable dehydrating agent.Type: GrantFiled: September 8, 1988Date of Patent: June 5, 1990Assignee: The United States of America as represented by the Secretary of the Air ForceInventor: Bruce A. Reinhardt
-
Patent number: 4871712Abstract: Provided are dialkyloxy-substituted terephthalic acids of the formula ##STR1## wherein R is an alkyl group having about 8 to 12 carbon atoms. Also provided is a method for preparing these dialkyloxy-substituted terephthalic acids.Type: GrantFiled: September 8, 1988Date of Patent: October 3, 1989Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Marilyn R. Unroe
-
Patent number: 4731442Abstract: A bis(o-diamine) is reacted with a bis(benziloxy)-2,2'-bis(arylethynyl)biphenyl to provide a qunioxaline polymer having pendant phenylethynyl groups. These polymers can be cured to provide thermally stable polymer compositions.Type: GrantFiled: October 2, 1986Date of Patent: March 15, 1988Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Patricia M. Lindley, Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4683309Abstract: Phenylquinoxaline monomers of the formula Ar--C.tbd.C--Pq--C.tbd.C--Ar are disclosed, wherein Pq is ##STR1## wherein X is a single bond, --O--, --S--, --SO.sub.2 --, --CH.sub.2 --, --CO--, --OC.sub.6 H.sub.4 O--, --OC.sub.6 H.sub.4 --C.sub.6 H.sub.4 --O--, --OC.sub.10 H.sub.6 O-- or --OC.sub.6 H.sub.4 SO.sub.2 C.sub.6 H.sub.4 O--; and wherein Ar is an aromatic ether or thioether. These monomers can be crosslinked to provide thermoset resins of the formula ##STR2## wherein Pq and Ar are as defined above and n has a value between 2 and 3.Type: GrantFiled: January 16, 1986Date of Patent: July 28, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Marilyn R. Unroe, Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4683340Abstract: Bis(benzilyloxy) compounds having the general formula ##STR1## wherein Ph is --C.sub.6 H.sub.5 and Ar is Ph, --C.sub.6 H.sub.4 Br, --C.sub.6 H.sub.4 CH.sub.3 or --C.sub.6 H.sub.4 C.sub.2 H.sub.5. These compounds can be reacted with bis(o-diamines) to form polyquinoxalines which can be converted to thermally stable compositions by non-volatile, intramolecular cyclization.Type: GrantFiled: October 8, 1986Date of Patent: July 28, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Patricia M. Lindley, Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4667002Abstract: Phenylquinoxaline monomers containing sterically hindered ethynyl groups are provided. These monomers can be crosslinked to provide thermoset resins of the general formula ##STR1## wherein Pq is a phenylquinoxaline linking unit. Ar is an aromatic ether or thioether, and n has a value between 2 and 3.Type: GrantFiled: January 16, 1986Date of Patent: May 19, 1987Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Marilyn R. Unroe, Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4547592Abstract: Arylether compounds containing terminal phenylethynyl groups are provided. Also provided is a process for producing these compounds. The following compounds are claimed; 4,4'-bis(3-phenylethynyl-phenoxy) diphenylsulfone; 2,2-bis[([([3-phenoxy]-3-phenoxy)-3-phenylethynyl]-3-phenoxy)-4-phenyl]-pr opane and 2,2-bis[([([3-phenoxy]-3-phenoxy)-3-phenyl ethynyl]-3-phenoxy)-4-phenyl]-hexafluoropropane.Type: GrantFiled: July 25, 1984Date of Patent: October 15, 1985Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Fred E. Arnold, Marilyn R. Unroe
-
Patent number: 4513131Abstract: Thermally stable resins based on arylether compounds having terminal phenylethynyl groups are provided.Type: GrantFiled: July 25, 1984Date of Patent: April 23, 1985Inventors: Bruce A. Reinhardt, Fred E. Arnold, Marilyn R. Unroe
-
Patent number: 4449001Abstract: Oxy- and thio-aryl-phenylated aromatic biscyclopentadienones are prepared from aromatic bis-benzils and benzylketones.Type: GrantFiled: March 8, 1983Date of Patent: May 15, 1984Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4417039Abstract: Aromatic and aromatic heterocyclic enyne polymers are prepared by reacting a di-.beta.-bromovinylbenzene and a diacetylenic compound. The polymers have relatively low glass transition temperatures for fabrication, and after heat treatment exhibit high glass transition temperatures, as well as low solvent susceptibility. Also provided is a new composition of matter 1,4-bis-(cis-.beta.-bromovinyl)benzene.Type: GrantFiled: July 19, 1982Date of Patent: November 22, 1983Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4400540Abstract: Oxy- and thio-aryl-phenylated aromatic biscyclopentadienones are prepared from aromatic bis-benzils and benzylketones.Type: GrantFiled: April 8, 1982Date of Patent: August 23, 1983Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Fred E. Arnold
-
Patent number: 4380619Abstract: Oxy- and thio-aryl-phenylated aromatic heterocyclic polymers having the general formula ##STR1## wherein Ar is a monovalent aromatic radical containing an oxy- or thio-linkage, Ar' is a divalent aromatic radical, R is a monovalent aromatic radical, Z is a divalent heterocyclic radical and n is an integer equal to the number of repeating units, are prepared from biscyclopentadienones with diethynyl heterocyclic compounds.Type: GrantFiled: April 8, 1982Date of Patent: April 19, 1983Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Bruce A. Reinhardt, Fred E. Arnold