Patents by Inventor Randall H. Helland

Randall H. Helland 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: 7169831
    Abstract: The invention relates to a pavement marking composition comprising ceramic fibers. The ceramic fibers are preferably randomly dispersed within a polymeric material. The polymeric material preferably comprises a substantially non-crosslinked elastomer. The pavement marking composition is preferably formed into a sheet material such as a tape.
    Type: Grant
    Filed: February 18, 2002
    Date of Patent: January 30, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Randall H. Helland, Eric E. Rice
  • Publication number: 20030099512
    Abstract: The invention relates to a pavement marking composition comprising ceramic fibers. The ceramic fibers are preferably randomly dispersed within a polymeric material. The polymeric material preferably comprises a substantially non-crosslinked elastomer. The pavement marking composition is preferably formed into a sheet material such as a tape.
    Type: Application
    Filed: February 18, 2002
    Publication date: May 29, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Randall H. Helland, Eric E. Rice
  • Publication number: 20030069358
    Abstract: The invention relates to thermoplastic pavement marking compositions comprising synthetic polymeric fibers.
    Type: Application
    Filed: September 26, 2002
    Publication date: April 10, 2003
    Applicant: 3M Innovative Properties Company
    Inventors: Randall H. Helland, Chin Yee Ng
  • Patent number: 6329128
    Abstract: An infrared photosensitive element comprising: a support bearing an infrared radiation-sensitive silver halide material; and an antihalation layer comprising a basic antistatic agent, an acid having a pKa less than 4.2 in an amount equal to at least 1.0% mole equivalent of acid to 1 mole equivalent of amine in said antistatic agent, and sufficient antihalation dye to provide a transmission optical density at the wavelength of maximum absorbence of said dye of at least 0.2 after coating.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: December 11, 2001
    Assignee: Eastman Kodak Company
    Inventors: Randall H. Helland, Charles W. Gomez, William D. Ramsden
  • Patent number: 5395747
    Abstract: Certain poly(lactic acid) and poly(glycolic acid) polymers or copolymers, and certain carbonates, lactones, lactates, lactylates, lactides, glycolates, glycolylates, and glycolides have been found to stabilize thermal-dye-bleach constructions containing a dye in association with a thermally-generated-bleaching agent. Preferably, the thermally-generated-bleaching agent is a thermal-carbanion-generating agent such as a quaternary ammonium salt of a phenylsulfonylacetic acid or a thermal-nucleophile-generating agent such as an ammonium salt of a phenylsulfonylacetic acid. These materials have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic elements.
    Type: Grant
    Filed: December 20, 1993
    Date of Patent: March 7, 1995
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Randall H. Helland, William D. Ramsden, Roger A. Mader
  • Patent number: 5384237
    Abstract: A thermal-dye-bleach construction comprising a dye in association with a thermal dye-bleaching agent of general formula I: ##STR1## wherein: each of R.sup.a and R.sup.b are individually selected from: hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group, and a heterocyclic group, and preferably, both R.sup.a and R.sup.b represent hydrogen;p is one or two, and when p is one, Z is a monovalent group selected from: an akyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, and a heterocyclic group, and when p is two, Z is a divalent group selected from: an alkylene group, an arylene group, an alkenylene group, an alkynylene group, an aralkylene group, a cycloalkene group, and a heterocyclic group; and,M.sup.+ is a cation which will not react with a carbanion generated from the thermal-carbanion-generating agent in such manner as to render the carbanion ineffective as a bleaching agent for the dye.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: January 24, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dian E. Stevenson, Mark P. Kirk, Sylvia A. Farnum, William C. Frank, Randall H. Helland, Jonathan P., Kitchin, Roger A. Mader, Mark B. Mizen, Richard A. Newmark, William D. Ramsden, Kumars Sakizadeh, Terence D. Spawn, George V. Tiers
  • Patent number: 5380635
    Abstract: Dihydroperimidine squarylium dyes have been found to be particularly effective when used in acutance and antihalation systems for photothermographic and photographic articles.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: January 10, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Charles W. Gomez, Lori S. Harring, Randall H. Helland, William D. Ramsden, Tran Van Thien
  • Patent number: 5324627
    Abstract: A thermal-dye-bleach construction comprising a dye in association with a thermal dye-bleaching agent of general formula I: ##STR1## wherein: each of R.sup.a and R.sup.b are individually selected from: hydrogen, an alkyl group, an alkenyl group, a cycloalkyl group, an aralkyl group, an aryl group, and a heterocyclic group, and preferably, both R.sup.a and R.sup.b represent hydrogen;p is one or two, and when p is one, Z is a monovalent group selected from: an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aralkyl group, an aryl group, and a heterocyclic group, and when p is two, Z is a divalent group selected from: an alkylene group, an arylene group, an alkenylene group, an alkynylene group, an aralkylene group, a cycloalkene group, and a heterocyclic group; and,M.sup.+ is cation which will not react with acarbanion generated from the thermal-carbanion-generating agent in such manner as to render the carbanion ineffective as a bleaching agent for the dye.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: June 28, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Dian E. Stevenson, Mark P. Kirk, Sylvia A. Farnum, William C. Frank, Randall H. Helland, Jonathan P. Kitchin, Roger A. Mader, Mark B. Mizen, Richard A. Newmark, William D. Ramsden, Kumars Sakizadeh, Terence D. Spawn, George V. Tiers
  • Patent number: 5314795
    Abstract: A thermal-dye-bleach construction comprising a polymethine dye having a nucleus of general formula I: ##STR1## in association with a thermal-carbanion-generating agent having the general formula: ##STR2## wherein the substituents are as defined in the specification and claims.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: May 24, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Randall H. Helland, Sylvia A. Farnum, Mark P. Kirk, Jonathan P. Kitchin, Roger A. Mader, Mark B. Mizen, Richard A. Newmark, William D. Ramsden, Kumars Sakizadeh, Terence D. Spawn, Dian E. Stevenson, George V. Tiers
  • Patent number: 5266452
    Abstract: A photographic element containing a thermal-dye-bleach construction includes a thermal nucleophile-generating agent in association with a polymethine dye having a nucleus of general formula (I): ##STR1##
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: November 30, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jonathan P. Kitchin, Mark P. Kirk, Dian E. Stevenson, Randall H. Helland
  • Patent number: 5258274
    Abstract: A thermal-dye-bleach construction comprising a thermal nucleophile-generating agent in association with a styryl dye having a nucleus of general formula (I): ##STR1## representing the nucleus of a styryl dye in which R=methyl or ethyl groupY=alkoxy of 1 to 20 carbon atomsm=1 or 2,n=1, 2, or 3, andx.sup..crclbar. =an anionThe aromatic fused benzene portion of the indolenine ring may be further substituted with commonly acceptable dye substituents such as alkyl and substituted alkyl (of 1 to 10 carbon atoms) groups, alkoxy groups (preferably of 1 to 10 carbon atoms), fused aromatic rings (as to make the benzene ring a fused naphthalene ring), halogen (including fluoro), cyano, nitro, carboxamido, amido, etc. One or two substituents chosen variously from said group may also be present on the phenyl ring to which the alkoxy group is attached.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: November 2, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Randall H. Helland, George V. D. Tiers, Dian E. Stevenson
  • Patent number: 5135842
    Abstract: A thermal-dye-bleach construction comprising a thermal nucleophile-generating agent in association with a polymethine dye having a nucleus of general formula (I): ##STR1## in which: n is 0, 1, 2 or 3;R.sup.1 and R.sup.4 are independently selected from the group consisting of hydrogen atoms, optionally substituted alkyl groups of up to 30 carbon atoms, optionally substituted alkenyl groups of up to 30 carbon atoms and optionally substituted aryl groups of up to 14 carbon atoms; andR.sup.1 and R.sup.2 together and/or R.sup.3 and R.sup.4 together may represent the necessary atoms to complete a 5 or 6-membered optionally substituted heterocyclic ring; orone or more of R.sup.1 to R.sup.4 may represent the necessary atoms to complete an optionally substituted 5 or 6-membered heterocyclic ring fused to the phenyl ring on which the NR.sup.1 R.sup.2 or NR.sup.3 R.sup.4 group is attached;R.sup.5 and R.sup.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: August 4, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jonathan P. Kitchin, Mark P. Kirk, Dian E. Stevenson, Randall H. Helland
  • Patent number: 4752559
    Abstract: A photothermographic recording article comprises in sequence:(a) a substrate,(b) a prime coat/antihalation layer comprising a pigmented acrylic polymer binder system,(c) a photothermographic dispersion comprising a binder, a non-light sensitive silver source material, photographic silver halide in catalytic proximity to silver source material, and(d) optionally, a topcoat layer,said article further comprising a reducing agent for silver ion and at least one development accelerator in at least one of the layers of the substrate.
    Type: Grant
    Filed: March 24, 1987
    Date of Patent: June 21, 1988
    Inventors: Randall H. Helland, Gregory J. McCarney
  • Patent number: 4681830
    Abstract: A flowable, dry powder of particles of a developing composition are provided. The compositions may be either heat- or pressure-fixable and utilize from about 0.4 to 10 parts by weight of fluorinated carbon per 100 parts by weight of a thermoplastic binder and a magnetically responsive material. The fluorinated carbon has a degree of fluorination in the range of 10% to 100% and an average diameter below about 2 microns. The developing powder compositions possess improved flow humidity resistance and provide dramatically improved copy quality.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: July 21, 1987
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Randall H. Helland, Craig A. Burton