Patents by Inventor Ibraheem T. Badejo

Ibraheem T. Badejo 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).

  • Publication number: 20020018689
    Abstract: An article of manufacture for dispensing a liquid adhesive includes an applicator body, a liquid adhesive contained within the applicator body, a porous applicator tip attached to the applicator body and in a non-contacting relationship with the liquid adhesive, and a polymerization initiator or rate modifier loaded in or on the applicator tip, wherein the polymerization initiator or rate modifier is selected from quaternary ammonium salts and tertiary amines. The liquid adhesive can also include a phase transfer catalyst.
    Type: Application
    Filed: April 16, 2001
    Publication date: February 14, 2002
    Inventors: Ibraheem T. Badejo, Jeffrey G. Clark, William Cotter, William L. Heard, Daniel L. Hedgpeth, Roy F. Thompson
  • Patent number: 6245933
    Abstract: An &agr;-cyanoacrylate may be formed by first condensing a cyanoacetate with paraformaldehyde or formaldehyde; reacting the polymer formed with an alcohol to transesterify the polymer; and depolymerizing the polymer to form &agr;-cyanoacrylate monomers.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 12, 2001
    Assignee: Closure Medical Corporation
    Inventors: Bernard Malofsky, Ibraheem T. Badejo
  • Patent number: 6066203
    Abstract: This invention relates to pigment derivatives having the formula ##STR1## wherein Q represents an organic pigment moiety;X is -SO.sub.2 - or -CO-;Alk is C.sub.2 -C.sub.8 alkylene or substituted C.sub.2 -C.sub.8 alkylene;m is an integer of from 1 to 4;n and p are independently integers of from 2 to 6.This invention further relates to the treatment of organic pigments with such pigment derivatives and the use of such treated pigments in coating compositions.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: May 23, 2000
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Daphne J. Rice
  • Patent number: 6031100
    Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) exposing a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, 2,5-dianilino-3,6-dihydroterephthalic acid, 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid, and/or derivatives thereof,(ii) about 3 to about 20 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) 0 to about 20 parts by weight, per part of component (a)(i), of a pigment additive,to microwave radiation under conditions that raise the bulk temperature of the reaction mixture to no more than about 250.degree. C.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: February 29, 2000
    Assignee: Bayer Corporation
    Inventor: Ibraheem T. Badejo
  • Patent number: 5972099
    Abstract: This invention relates to a process for preparing pigment compositions by(a) treating an organic pigment with(1) a sterically hindered and/or bulky primary amine, and(2) a liquid in which the organic pigment is insoluble, and(b) blending the resultant surface-treated pigment composition from step (a) with a pigment derivative of formula (I) ##STR1## wherein Q represents an organic pigment moiety,X is O, S, NR.sup.1, --SO.sub.2 --, --CO--, --Alk--, --Ar--, or combinations thereof,Y is --OR.sup.2, --NR.sup.3 R.sup.4, or Het,Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof,Ar is arylene,R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl,Het is a heterocycle, andn is 1 to 4.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: October 26, 1999
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Daphne J. Rice, Michael J. Greene
  • Patent number: 5879444
    Abstract: This invention relates to pigment compositions containing an organic pigment treated with a pigment derivative having the formula (I) ##STR1## wherein Q represents an organic pigment moiety;X is O, S, or N--R.sup.1 ;Y is N--R.sup.2, O, or a direct bond;Z is --CO--, --Alk--, --Ar--, or chemically reasonable combinations thereof;Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof;Ar is arylene;R.sup.1 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.7 -C.sub.16 aralkyl, or --CN; andR.sup.2 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl;with the provisos that(1) the cyclic moiety represented by the formula ##STR2## must be a four- to seven-membered ring, (2) Z can contain a C.dbd.O group adjacent to the nitrogen atom of the Q--CH.sub.2 --N moiety only if Y is N--R.sup.2 or O, and(3) X can be O only if Y is N--R.sup.2 or O.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: March 9, 1999
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Daphne J. Rice
  • Patent number: 5868828
    Abstract: This invention relates to quinacridone pigments of formula (I) ##STR1## wherein X is O, S, or NR;R is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, or C.sub.7 -C.sub.16 aralkyl;Y is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, or halogen;the dashed line represents an optional double bond;R.sup.1 and R.sup.2 are independently hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 aralkyl, nitrile, or carboxyl or an ester or an amide thereof, or R.sup.1 and R.sup.2 together form a C.sub.5 -C.sub.8 cycloaliphatic ring or a fused-on aromatic or heteroaromatic ring;R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkyl; andm is 0, 1, or 2.This invention further relates to the preparation and use of such quinacridone pigments.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: February 9, 1999
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Guenter Franke
  • Patent number: 5755873
    Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating a reaction mixture comprising(i) a 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid, or a 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid;(ii) about 0.1 to about 15 percent by weight, based on component (a)(i), of one or more sulfonyl-containing derivatives of 2,5-dianilinoterephthalic acid, 2,5-dianilino-3,6-dihydroterephthalic acid, and/or 2,5-dianilino-3,6-dioxo-1,4-cyclohexadiene-1,4-dicarboxylic acid; and(iii) about 3 to about 20 parts by weight, per part of component (a)(i), of a dehydrating agent,with the proviso that if either component (a)(i) or component (a)(ii) is a 2,5-dianilino-3,6-dihydroterephthalic acid or derivative thereof, reaction step (a) additionally comprises an oxidation step;(b) drowning the reaction mixture from step (a) with a liquid in which the quinacridone pigment is substantially insoluble; and(c) isolating the quinacridone pigment.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: May 26, 1998
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, John F. Britanak, Daphne J. Rice
  • Patent number: 5741356
    Abstract: This invention relates to a process for preparing pigment compositions comprising(a) treating an organic pigment with(1) about 0.1 to about 100% by weight, relative to the organic pigment, of a sterically hindered and/or bulky primary amine,(2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and(3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,thereby forming a suspension of the surface-treated pigment composition in the liquid;(b) exposing the suspension to cavitating conditions; and(c) collecting the pigment composition.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: April 21, 1998
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Charles E. Shannon, Guenter G. Franke
  • Patent number: 5728206
    Abstract: This invention relates to a process for preparing pigment compositions comprising(a) treating an organic pigment with(1) about 0.1 to about 100% by weight, relative to the organic pigment, of a tertiary alkyl primary amine having the formula (I) ##STR1## wherein R.sup.1 is a C.sub.5 -C.sub.30 (cyclo)aliphatic group, andR.sup.2 and R.sup.3 are independently C.sub.1 -C.sub.6 alkyl,(2) 0 to about 100% by weight, relative to the organic pigment, of a surfactant, and(3) about 5 to about 15 parts by weight per part by weight of the organic pigment of a liquid in which the organic pigment is substantially insoluble,thereby forming a suspension of the surface-treated pigment composition in the liquid; and(b) collecting the pigment composition.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: March 17, 1998
    Assignee: Bayer Corporation
    Inventor: Ibraheem T. Badejo
  • Patent number: 5713999
    Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating, at a temperature of about 80.degree. C. to about 145.degree. C., a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid ester, and/or a derivative thereof,(ii) about 3 to about 15 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) about 0.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: February 3, 1998
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Margot Campos, Michael J. Greene, Daphne J. Rice
  • Patent number: 5711800
    Abstract: This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of an N-heteroarylamidomethyl pigment derivative having the formula (I) ##STR1## wherein, Q represents an organic pigment moiety,NHet represents a nitrogen-containing heteroaromatic group attached at a ring nitrogen atom to the carbonyl function of the amidomethyl linking group, andn is from 1 to 4.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: January 27, 1998
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, John F. Britanak, Margot Campos, Daphne J. Rice, Niran Nugara
  • Patent number: 5698024
    Abstract: This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of a compound having the formula (I) ##STR1## wherein Q represents an organic pigment moiety,X is O or S,Het represents a heteroaromatic group attached at a ring carbon atom to the (thio)amidomethyl --CH.sub.2 --NH--CX-- linking group, andn is from 1 to 4.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: December 16, 1997
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Daphne J. Rice
  • Patent number: 5683502
    Abstract: This invention relates to a process for the preparation of quinacridone pigments by(a) heating, at a temperature of about 80.degree. C. to about 145.degree. C., a reaction mixture containing(i) 2,5-dianilinoterephthalic acid, a 2,5-dianilino-3,6-dihydroterephthalic acid ester, and/or a derivative thereof,(ii) about 3 to about 15 parts by weight, per part of component (a)(i), of a dehydrating agent, and(iii) about 0.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: November 4, 1997
    Assignee: Bayer Corporation
    Inventors: Ibraheem T. Badejo, Daphne J. Rice