Hellmann; John R.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Hellmann; John R..The latest application filed is for "proppants from mineralogical material".

Company Profile

1.5.5

Hellmann; John R. - State College PA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Proppants from mineralogical material Grant 8,959,954 - Koseski , et al. February 24, 2	2015-02-24
Proppants From Mineralogical Material App 20130125586 - Koseski; Ryan P. ; et al.	2013-05-23
Treatment of melt quenched aluminosilicate glass spheres for application as proppants via devitrification processes Grant 8,359,886 - Koseski , et al. January 29, 2	2013-01-29
Treatment of particles for improved performance as proppants Grant 8,193,128 - Hellmann , et al. June 5, 2	2012-06-05
Treatment of particles for improved performance as proppants App 20100326657 - Hellmann; John R. ; et al.	2010-12-30
Material having a controlled microstructure, core-shell macrostructure, and method for its fabrication Grant 7,828,998 - Luscher , et al. November 9, 2	2010-11-09
Treatment Of Melt Quenched Aluminosilicate Glass Spheres For Application As Proppants Via Devitrification Processes App 20100068521 - Koseski; Ryan P. ; et al.	2010-03-18
Method For Producing Proppant Using A Dopant App 20090118145 - Wilson; Brett Allen ; et al.	2009-05-07
Material Having A Controlled Microstructure, Core-shell Macrostructure, And Method For Its Fabrication App 20080015103 - Luscher; Walter G. ; et al.	2008-01-17

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