1
Warren R Beck, Richard B Castle: Proppant for well fractures and method of making same. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Douglas B Little, January 15, 1985: US04493875 (158 worldwide citation)

The novel proppant consists of composite particles, the core of which is a conventional proppant particle such as silica sand. The core has a thin, void-containing coating which provides an overall density approaching that of the fracturing fluid. The coating preferably comprises hollow glass micros ...


2
Richard B Castle: Fused glassy particulates obtained by flame fusion. Minnesota Mining & Manufacturing Company, Hall Priddy Myers & Vande Sande, July 3, 2001: US06254981 (67 worldwide citation)

The disclosure describes methods for producing bulk, particulate material that includes solid, generally ellipsoidal particles. Irregularly shaped feed particles with average particle sizes of up to 25 microns on a volume basis are dispersed in at least a portion of a combustible gas mixture by appl ...


3
Richard B Castle: Compositions comprising fused particulates and methods of making them. Minnesota Mining and Manufacturing Company, Janice L Dowdall, March 16, 1999: US05883029 (29 worldwide citation)

The disclosure describes a method for producing bulk, particulate material that includes solid, generally ellipsoidal particles by dispersing irregularly shaped feed particles including about 60 to 100% by weight of at least one silicate-containing material selected from among wollastonite, alkali f ...


4
Richard B Castle: At least partly fused particulates and methods of making them by flame fusion. Minnesota Mining and Manufacturing Company, Janice L Dowdall, April 4, 2000: US06045913 (25 worldwide citation)

The disclosure describes methods for producing bulk, particulate material that includes solid, generally ellipsoidal particles. Irregularly shaped feed particles with average particle sizes of up to 25 microns on a volume basis are dispersed in at least a portion of a combustible gas mixture by appl ...


5
Richard B Castle: Compositions comprising fused particulates and methods of making them. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, James V Lilly, September 24, 1996: US05559170 (22 worldwide citation)

The disclosure describes a method for producing bulk, particulate material that includes solid, generally ellipsoidal particles by dispersing irregularly shaped feed particles including about 60 to 100% by weight of at least one silicate-containing material selected from among wollastonite, alkali f ...


6
Charles R Kuykendall, Richard B Castle: Breakaway timber support poles. Minnesota Mining & Manufacturing Company, D M Sell, J A Smith, R R Tamte, February 21, 1984: US04432172 (16 worldwide citation)

Timber support poles are given desired breaking properties to reduce the deceleration of a vehicle that collides with the pole by cutting one or more recesses in the pole, and filling the recesses with a polymeric filler composition.


7
Richard B Castle: Compositions comprising fused particulates and methods of making same. June 24, 1997: US05641717 (4 worldwide citation)

The disclosure describes a method for producing bulk, particulate material that includes solid, generally ellipsoidal particles by dispersing irregularly shaped feed particles including about 60 to 100% by weight of at least one silicate-containing material selected from among wollastonite, alkali f ...


8
Richard B Castle: Fused glassy particulates obtained by flame fusion. Minnesota Mining and Manufacturing Company, Janice L Dowdall, February 22, 2000: US06027799

The disclosure describes methods for producing bulk, particulate material that includes solid, generally ellipsoidal particles. Irregularly shaped feed particles with average particle sizes of up to 25 microns on a volume basis are dispersed in at least a portion of a combustible gas mixture by appl ...