DH

David A. Helms

Chevron: 11 patents #427 of 4,788Top 9%
Overall (All Time): #428,923 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5625293 Determination of the watercut of a multiphase flow directly from measured microwave frequency dielectric properties John D. Marrelli, Joseph D. Stafford, Michael G. Durrett, Gregory J. Hatton 1997-04-29
5483171 Determination of water cut and gas-fraction in oil/water/gas streams Gregory J. Hatton, John D. Marrelli 1996-01-09
5473256 Combination microwave waveguide and pressure barrier Joseph D. Stafford, Gregory J. Hatton 1995-12-05
5412326 Means and method for analyzing a petroleum stream John D. Marrelli, Michael G. Durrett, Lisa L. Pepin, Gregory J. Hatton 1995-05-02
5315117 Volume meter system Gregory J. Hatton, Michael G. Durrett 1994-05-24
5014010 Dual frequency microwave water cut monitoring means and method Michael G. Durrett, Gregory J. Hatton 1991-05-07
4977377 Microwave water cut monitor with temperature controlled test cell Michael G. Durrett, Gregory J. Hatton, Earl L. Dowty, John D. Marrelli, Joseph D. Stafford +1 more 1990-12-11
4947127 Microwave water cut monitor Gregory J. Hatton, Michael G. Durrett, Earl L. Dowty, John D. Marrelli 1990-08-07
4947128 Co-variance microwave water cut monitoring means and method Gregory J. Hatton, Michael G. Durrett, John D. Marrelli, Joseph D. Stafford 1990-08-07
4947129 Petroleum stream microwave watercut monitor John D. Marrelli 1990-08-07
4660414 Petroleum stream monitoring means and method Gregory J. Hatton, Thomas M. Williams, Jr. 1987-04-28
4499418 Water cut monitoring means and method Gregory J. Hatton, Thomas M. Williams, Jr. 1985-02-12