Patents Represented by Attorney Cruzan Alexander
  • Patent number: 4539816
    Abstract: The present invention relates to the recovery of heat and/or condensable liquid from a gaseous environment utilizing an open cycle heat pump system. The open cycle heat pump system is employed to alter the temperature of a gas by compression, expansion, heat exchange, and combinations thereof, to condense selected vapors carried in the gaseous environment for removal from the gas. The open cycle heat pump system can also be used to extract the heat from a gas for use as desired.
    Type: Grant
    Filed: January 24, 1983
    Date of Patent: September 10, 1985
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Bryce J. Fox
  • Patent number: 4480393
    Abstract: Vapor recovery system comprising vapor source, vapor concentrating system and refrigeration condensation system. Method comprises accumulating condensable vapor in vapor accumulator, and subsequently removing vapor from accumulator using carrier gas to provide concentrated carrier gas stream. Vapor in carrier gas is condensed by refrigeration condensation means.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: November 6, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Leslie R. Flink, Bryce J. Fox, Mary K. Witzel
  • Patent number: 4476276
    Abstract: A sealing composition prepared by reacting water-soluble polyurethane prepolymer with water containing latex to provide a gelled viscous mass which will cure to a cross-linked latex-reinforced gel capable of preventing or inhibiting leakage in various structures, when applied at the site of the leakage in the viscous state. The sealing composition of the invention also preferably contains up to 60% by weight of fillers of the total weight of the composition to provide a high compressive strength, shrink-resistant sealing composition.
    Type: Grant
    Filed: April 23, 1981
    Date of Patent: October 9, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Alton J. Gasper
  • Patent number: 4472480
    Abstract: Low surface energy liner provided by segments of a perfluoropolyether monomer which has been in-situ polymerized into a cohesive network which is adhered to a substrate. The low surface energy liner is especially useful as a low-adhesion backsize coating for a pressure-sensitive adhesive tape.
    Type: Grant
    Filed: July 2, 1982
    Date of Patent: September 18, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Paul E. Olson
  • Patent number: 4468527
    Abstract: A fluoroaliphatic radical- and aliphatic chlorine-containing alcohol containing more than 25 weight percent carbon-bonded fluorine in the form of fluoroaliphatic radicals and at least one aliphatic chlorine, an ester of said alcohol and a carboxycylic acid being useful in the treatment of carpet.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: August 28, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Kalyanji U. Patel
  • Patent number: 4450263
    Abstract: A fluoropolymer gum of 60 to 85 mol percent vinylidene fluoride, 10 to 40 mol percent of hexafluoropropene and 0.15 to 3 mol percent 1-bromo-2,2-difluoroethylene is provided which can be blended with fluorosilicone gum and vulcanized in presence of free-radical initiators to produce elastomeric vulcanizates with desired balance of chemical solvent or fluid resistance, high temperature stability, and low temperature flexibility, coupled with good physical properties such as high tensile strength and elongation.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: May 22, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Arthur C. West
  • Patent number: 4443354
    Abstract: Granular sorbent material comprising a granular high surface area support impregnated with a water soluble, essentially non-volatile primary or secondary amine with equivalent weight less than about 400 and bearing either zero or two carbonyl substituents attached directly to the amino nitrogen atom is disclosed. The resulting material can be used as the filtration media in respirators, powered air purifiers, room air purifiers, ventilation filters, exhaust filters, process gas filters and the like to reduce the formaldehyde content of air.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: April 17, 1984
    Assignee: Minnesota Minning and Manufacturing Company
    Inventor: Gilbert L. Eian
  • Patent number: 4424352
    Abstract: Preparation of palladium(II) bis(hexafluoroacetylacetonate) and adducts derived therefrom are disclosed, said adducts having the formulaPd(F.sub.6 ACAC).sub.2 .multidot.L.sub.nwherein L is a Lewis base selected from certain classes, and n is an integer from 1 to 4. These compounds are useful in preparing catalytic and primer surfaces of elemental palladium.
    Type: Grant
    Filed: June 13, 1980
    Date of Patent: January 3, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Allen R. Siedle
  • Patent number: 4423139
    Abstract: Synergistic combinations for use in stabilizing thermographic imaging systems comprise (1) one or more aromatic compounds which form quinones, diimines, or quinonimines upon oxidation in combinaton with (2) 1-phenyl-3-pyrazolidinone, or derivatives or 1-phenyl-3-pyrazolidinone. When used in a thermographic imaging system comprising a nitrate salt, and a leuco dye in a binder these stabilizing combinations prevent oxidation and premature reaction of the leuco dye.
    Type: Grant
    Filed: February 24, 1982
    Date of Patent: December 27, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Russell R. Isbrandt, Robert D. Lowrey
  • Patent number: 4416280
    Abstract: A system for achieving cardioplegia, a protective cessation of the heart muscle activity during open heart surgery which includes providing a circulation system in parallel with the main life support system and deriving a blood source from the arterial reservoir of the main life support system, moving blood from said source through a cooling heat exchanger for selective discharge to the aorta of the heart patient or to a cardiotomy reservoir in the main life support system. The system includes a means for titration of medication to the blood and temperature control and monitoring equipment.
    Type: Grant
    Filed: December 10, 1981
    Date of Patent: November 22, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Walter L. Carpenter, Bruce A. Amrine
  • Patent number: 4412096
    Abstract: An acoustically sealed earmold and a receiver adapter insertable into the ear of an individual with impaired hearing and used in conjunction with an external receiver to evaluate hearing. A unique method of coupling the receiver adapter to the earmold is also disclosed. The adapter is inserted into the molded portion of the earmold and provides a straight passageway for transmission of sound energy from the receiver to the occluded space of the external canal of the ear. The device substantially reduces the problem of acoustic feedback in high gain hearing aid fittings and provides more accurate transmission of acoustic signals to allow improved hearing evaluation. This invention enables an audiologist to fit the earmold and conduct hearing aid evaluations in a single office visit.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: October 25, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Bradly J. Edgerton, William F. House, Robert C. Michaels
  • Patent number: 4406827
    Abstract: A cohesive nonsticky electrically conductive gel is disclosed, for facilitating low resistance contact between a metal electrode and a biological body. The gel comprises an aqueous solution of up to saturated concentrations of ionized salts as the conducting agent, a natural gum capable of crosslinking, and a crosslinking material which provides the electrically conductive gel with sufficient internal strength to remain cohesive without reinforcement. The gel has good electrical characteristics and improved physical properties which prevent the gel from leaving a messy residue on the skin of the patient or on the electrode.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: September 27, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Hatim M. Carim
  • Patent number: 4406522
    Abstract: A variable magnification optical system comprising two lens components one on each side of an aperture stop with a positive lens element in each component connected for simultaneous movement to afford a change of 14.5.times. to 16.2.times. magnification in an object to image distance of 1108.96 mm.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: September 27, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Lawrence H. Conrad
  • Patent number: 4405676
    Abstract: The present invention provides economical decorative ribbon or sheet material exhibiting desirable aesthetic qualities.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: September 20, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Daniel P. Pohl
  • Patent number: 4405497
    Abstract: A catalyst system is provided which comprises a fluorinated acid and a polyvalent tin compound. The catalyst system can be used to prepare hydroxyl-terminated poly(haloalkylene ethers).
    Type: Grant
    Filed: March 5, 1982
    Date of Patent: September 20, 1983
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Chung I. Young, Loren L. Barber, Jr.
  • Patent number: 4405612
    Abstract: Microfibrous heparin salts, nonwoven webs of such fibers, a process for preparing the fibers and the use of the webs for the rapid heparinization of blood are disclosed.
    Type: Grant
    Filed: May 21, 1981
    Date of Patent: September 20, 1983
    Assignee: Riker Laboratories, Inc.
    Inventor: Charles G. Thiel
  • Patent number: D270739
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: September 27, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Walter C. Pearson
  • Patent number: D270740
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: September 27, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Walter C. Pearson
  • Patent number: D271113
    Type: Grant
    Filed: July 9, 1981
    Date of Patent: October 25, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Stephen P. Birkeland, Noboru Sawamura
  • Patent number: D271981
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: December 27, 1983
    Assignee: Minnesota Mining & Manufacturing Company
    Inventor: Walter C. Pearson