Inventor · disambiguated record
Richard L. Helferich
Also filed as: HELFERICH RICHARD · HELFERICH RICHARD L
11 granted patents·1 pending application·497 citations·filing 1980–2012
93Inventor score
Top patents by PatentIndex Score
12 records- 0196US4432798AAluminosilicate hydrogel bonded aggregate articlesDURIRON CO·Filed 1981·Granted Feb 21, 1984·101 cites·23 claims
- 0291US4976760APorous ceramic article for use as a filter for removing particulates from diesel exhaust gasesCERCONA INC·Filed 1989·Granted Dec 11, 1990·87 cites·1 claims
- 0391US4846906AMethods for the manufacture of porous ceramic shapes containing membraneous surfacesDURIRON CO·Filed 1987·Granted Jul 11, 1989·33 cites·11 claims
- 0489US4871495AProcess for producing porous ceramic filter for filtering of particulates from diesel exhaust gasesDURIRON CO·Filed 1987·Granted Oct 3, 1989·68 cites·5 claims
- 0585US4357165AAluminosilicate hydrogel bonded granular compositions and method of preparing sameDURIRON CO·Filed 1980·Granted Nov 2, 1982·40 cites·27 claims
- 0684US6261986B1Production and article of iron/surfactant-modified zeolite pellets to retain and destroy water pollutantsNEW MEXICO TECH RES FOUNDATION·Filed 1998·Granted Jul 17, 2001·66 cites·20 claims
- 0783US4814300APorous ceramic shapes, compositions for the preparation thereof, and method for producing sameDURIRON CO·Filed 1987·Granted Mar 21, 1989·42 cites·18 claims
- 0871US4963515ALightweight hydrogel-bound aggregate shapes and process for producing sameDURIRON CO·Filed 1988·Granted Oct 16, 1990·23 cites·10 claims
- 0968US4812424AKiln furniture for the firing of ceramic articlesDURIRON CO·Filed 1987·Granted Mar 14, 1989·20 cites·7 claims
- 1062US8409344B2Cement and methods of preparing cementSCHORR RICHARD J·Filed 2008·Granted Apr 2, 2013·3 cites·7 claims
- 1157US4878947AMethod for manufacture of porous refractory articlesDURIRON CO·Filed 1988·Granted Nov 7, 1989·14 cites·11 claims
- 1233US2013098840A1Porous Composite Media for Removing Phosphorus from WaterHELFERICH RICHARD·Filed 2012·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →