1
Rodney L Bleifuss, David M Hopstock: Magnetic separator apparatus and methods regarding same. Regents of the University of Minnesota, Mueting Raasch & Gebhardt P A, July 3, 2001: US06253924 (18 worldwide citation)

A magnetic separator apparatus for use in separating magnetic material from a mixture of at least magnetic material and a liquid includes an endless belt defining a channel. A portion of the endless belt is movable up an incline relative to horizontal through a separation zone. The endless belt incl ...


2
Thomas J Dahlin, Gregory F Jacobs, David M Hopstock, Robert L Keech, Richard E Fayling, Richard G Newell, Claud M Lacey, Bernard A Gonzalez: Conformable magnetic articles for use with traffic bearing surfaces methods of making same systems including same and methods of use. 3M Innovative Properties Company, October 22, 2002: US06468678 (18 worldwide citation)

Magnetic, conformable articles for use with traffic bearing surfaces are disclosed which comprise an organic binder having magnetic particles distributed therein. The articles may be employed in intelligent vehicle guidance systems, and in systems to guide other mobile objects such as farm animals, ...


3
Gary W Clark, Thomas J Dahlin, Richard E Fayling, Bernard A Gonzalez, David M Hopstock, Gregory F Jacobs, Robert L Keech: Conformable magnetic articles underlaid beneath traffic-bearing surfaces. Minnesota Mining and Manufacturing Company, Lisa M Fagan, Peter L Olson, December 29, 1998: US05853846 (15 worldwide citation)

A conformable magnetic article for underlayment beneath a traffic-bearing surface which sends a magnetic signal to a sensor traveling over the traffic-bearing structure. The magnetic article comprises at least one conformable magnetic layer comprising a binder and a sufficient amount of magnetic par ...


4
Daniel W Hawtof, David M Hopstock, Gregory F Jacobs: Optical fiber encoded with data signal. Corning Incorporated, Timothy R Krogh, James V Suggs, Svetlana Short, November 18, 2003: US06650815 (11 worldwide citation)

The present invention relates to an optical fiber including a fiber core and at least one coating substantially encapsulating the fiber core, wherein the at least one coating includes a material forming a data storage medium which is capable of digitally encoding information at a data density of at ...


5
Arthur F Colombo, David M Hopstock: Process for scavenging iron from tailings produced by flotation beneficiation and for increasing iron ore recovery. The United States of America represented by the Secretary of the Interior, William S Brown, Donald A Gardiner, March 11, 1980: US04192738 (10 worldwide citation)

There is disclosed a process for scavenging iron from tailings produced by the flotation beneficiation of iron ore. This process includes the step of scavenging the flotation tailings using wet high-intensity magnetic separation (WHIMS). There is also disclosed a process for increasing the recovery ...


6
David M Hopstock, John S Roden, Gunther H Dierssen, Ronald S Sapieszko: Hexagonal magnetic ferrite pigment for high density magnetic recording applications. Imation, Susan Moeller Zerull, April 1, 1997: US05616414 (3 worldwide citation)

The present invention provides a hexagonal magnetic ferrite pigment suitable for high density magnetic recording applications. The pigment is characterized by small particle size, a modified magnetoplumbite structure, and relatively high magnetic moment. The pigment is capable of being prepared by f ...


7
David M Hopstock, John S Roden, Gunther H Dierssen, Ronald S Sapieszko: Hexagonal magnetic ferrite pigment for high density magnetic recording applications. Imation, Susan Moeller Zerull, May 6, 1997: US05626956 (3 worldwide citation)

The present invention provides a hexagonal magnetic ferrite pigment suitable for high density magnetic recording applications. The pigment is characterized by small particle size, a modified magnetoplumbite structure, and relatively high magnetic moment. The pigment is capable of being prepared by f ...


8
David M Hopstock, John S Roden, Gunther H Dierssen, Ronald S Sapieszko: Process of making hexagonal magnetic ferrite pigment for high density magnetic recording applications. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, David B Kagan, January 3, 1995: US05378384 (2 worldwide citation)

The present invention provides a hexagonal magnetic ferrite pigment suitable for high density magnetic recording applications. The pigment is characterized by small particle size, a modified magnetoplumbite structure, and relatively high magnetic moment. The pigment is capable of being prepared by f ...


9
Daniel W Hawtof, David M Hopstock, Gregory F Jacobs: Optical fiber encoded with data signal. Corning Incorporated, February 6, 2003: US20030026568-A1

The present invention relates to an optical fiber including a fiber core and at least one coating substantially encapsulating the fiber core, wherein the at least one coating includes a material forming a data storage medium which is capable of digitally encoding information at a data density of at ...



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