Stephens; Douglas K.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Stephens; Douglas K..The latest application filed is for "precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes".

Company Profile

0.6.1

Stephens; Douglas K. - Dickinson TX

*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
Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes Grant 6,638,354 - Stephens , et al. October 28, 2	2003-10-28
Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes App 20030097966 - Stephens, Douglas K. ; et al.	2003-05-29
Fine-celled foam composition and method having improved thermal insulation and fire retardant properties Grant 6,409,817 - Stephens June 25, 2	2002-06-25
Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes Grant 6,375,735 - Stephens , et al. April 23, 2	2002-04-23
Highly activated carbon from caustic digestion of rice hull ash and method Grant 6,114,280 - Stephens September 5, 2	2000-09-05
Method of producing activated carbon Grant 5,858,911 - Wellen , et al. January 12, 1	1999-01-12
Fine-celled foam composition and method Grant 5,714,000 - Wellen , et al. February 3, 1	1998-02-03

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