11
Kotz Arthur R: Electrographic development process. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & Delahunt, September 30, 1975: US3909258 (108 worldwide citation)

An electrographic process involving the development of electrical potential patterns on a recording medium surface, for example electrostatic charge patterns on a photoconductive element, with electronically conductive, magnetically attractable toner material utilizing electrical forces generated by ...


12
Howard Robert N, Sowman Harold G: Spheroidal composite particle and method of making. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, November 4, 1975: US3916584 (107 worldwide citation)

Composite abrasive granules, in which fine, hard abrasive grains are distributed throughout a relatively softer metal oxide matrix, can be substituted for conventional abrasive grains. In a preferred method of manufacture, the abrasive grains are dispersed in a metal oxide gel, the gel dehydrated to ...


13
Sevelin Charles V, Palmquist Philip V: Retro-reflective film. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & Delahunt, April 2, 1974: US3801183 (101 worldwide citation)

Legend containing substantially transparent retro-reflective sheet materials and articles to which the sheet material has been applied, the sheet material having both retro-reflective legend areas and retro-reflective background areas which are substantially indistinguishable under ordinary diffuse ...


14
Elton Robert L, Vander Louw John F: Stretch-oriented porous films and preparation and use thereof. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, March 11, 1975: US3870593 (101 worldwide citation)

Porosity (preferably microporosity) can be introduced into a polymeric film by (1) dispersing finely divided particles of a non-hygroscopic inorganic salt such as calcium carbonate into a suitable polymer, e.g., by milling, (2) forming a film of the filled polymer, and (3) stretching the film to pro ...


15
James A Bonham, Panayotis C Petrellis: Chromophore-substituted vinyl-halomethyl-s-triazines. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, October 19, 1976: US03987037 (101 worldwide citation)

Chromophore-substituted vinyl-halomethyl-s-triazine compounds are provided capable of free-radical generation upon excitation with radiation having a wavelength of from about 330 to about 700 millimicrons.


16
Robert A Luhman, John R Ward: System for inflation and sealing of air cushions. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, February 17, 1976: US03938298 (99 worldwide citation)

A system providing an improved inflatable cushion of the type comprising two films of a thermoplastic fused together to provide a plurality of inflatable chambers between the films, with each chamber communicating with a central inlet opening through an inlet passageway; and an improved device for f ...


17
Lawrence L Martin, Robert C Westerberg: Prosthetic bone joint devices. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & Delahunt, November 16, 1976: US03991425 (84 worldwide citation)

A surgically implantable prosthetic joint replacement device formed preferably of ceramic and having mating concave and convex condylar surfaces and intersecting lands for stopping motion at extended and pairs of contracted positions of the joint. The device consists of male and female portions for ...


18
Olyphant Jr Murray, Rohloff Robert R: Circuitry and method. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & Delahunt, September 3, 1974: US3832769 (83 worldwide citation)

A method for mounting semiconductor chips to printed circuitry via conductive columns which extend through the dielectric substrate and electrically communicate with a predetermined pattern of conductive leads on the opposite surface of the substrate. Printed circuitry useful for practicing the meth ...


19
Bonham James A: Photopolymerizable sheet material with diazo resin layer. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, September 16, 1975: US3905815 (82 worldwide citation)

Light-sensitive sheet material is provided comprising a base sheet bearing a thin coating of a diazo resin over which is provided a photopolymerizable layer. Upon exposure of the sheet material to actinic radiation, the image areas of the photopolymerizable layer as well as corresponding areas of di ...


20
Wilfred R Brochman: Easy open closure system. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, November 9, 1976: US03990603 (80 worldwide citation)

An improved easy open closure system is described, the closure system being particularly useful for cans containing carbonated beverages. The closure system comprises an exterior tape (having specified properties) which is adhesively secured to the portion of the container surrounding a pre-formed o ...