ROTOSTRAINER
Filed: November 24, 1972
ROTARY SELF-CLEANING SOLIDS RECOVERY SCREENS
Owned by: PARKSON CORPORATION
Serial Number: 72442115
DISCOSTRAINER
Filed: January 3, 1977
INDUSTRIAL FILTRATION APPARATUS FOR REMOVING SOLIDS FROM LIQUIDS
Owned by: PARKSON CORPORATION
Serial Number: 73111333
HYPRESS
Filed: February 21, 1978
HYDRAULICALLY-OPERATED DEWATERING PRESSES
Owned by: PARKSON CORPORATION
Serial Number: 73159376
MAGNUM PRESS
Filed: April 3, 1978
BELT FILTER PRESSES FOR DEWATERING SLUDGE
Owned by: PARKSON CORPORATION
Serial Number: 73164790
DYNASAND
Filed: May 7, 1979
SAND FILTERS FOR CONTINUOUS REMOVAL OF SUSPENDED MATTER FROM A LIQUID
Owned by: PARKSON CORPORATION
Serial Number: 73214682
HYCOR
Filed: August 22, 1979
Solids Dewatering Products, Specifically Rotary Self-Cleaning Solids Recovery Screens, Disc Strainers, Stationary Self-Cleaning…
Owned by: PARKSON CORPORATION
Serial Number: 73228592
ROTOSHEAR
Filed: March 5, 1982
Rotary Self-Cleaning Solids Recovery Screens
Owned by: PARKSON CORPORATION
Serial Number: 73353216
OXYCHARGER
Filed: June 24, 1985
STATIC AERATORS FOR USE IN WATER OXYGENATION
Owned by: PARKSON CORPORATION
Serial Number: 73544703
BIOLAC
Filed: June 19, 1987
AERATION CHAINS MADE OF HOSE AND FLOAT ASSEMBLIES WHICH SUPPORT FINE BUBBLE DIFFUSERS; AIR PIPING MANIFOLD, BLOWERS, PARTITION…
Owned by: PARKSON CORPORATION
Serial Number: 73667322
AQUA GUARD
Filed: August 28, 1987
MECHANICAL EQUIPMENT, NAMELY, A FILTER SCREEN WHICH REMOVES SUSPENDED AND SOLID MATERIALS FROM A LIQUID STREAM
Owned by: PARKSON CORPORATION
Serial Number: 73681038
SCHREIBER
Filed: August 26, 1988
WASTE WATER TREATMENT PLANTS AND PARTS THEREFOR FOR THE TREATMENT OF LIQUID AND SOLID CONTAMINANTS INCLUDED IN MUNICIPAL…
Owned by: PARKSON CORPORATION
Serial Number: 73748528
COUNTER CURRENT
Filed: August 26, 1988
WASTE WATER TREATMENT PLANTS AND PARTS THEREFOR FOR THE TREATMENT OF LIQUID AND SOLID CONTAMINANTS INCLUDED IN MUNICIPAL…
Owned by: PARKSON CORPORATION
Serial Number: 73748542
AQUALIFT
Filed: December 27, 1988
SCREW PUMP
Owned by: PARKSON CORPORATION
Serial Number: 73771615
AERATION PANEL
Filed: August 23, 1989
WASTERWATER AERATORS FOR BIOLOGICAL WASTEWATER TREATMENT
Owned by: PARKSON CORPORATION
Serial Number: 73821102
LYNX
Filed: March 9, 1990
automatic chain driven bar screens for liquid/solid separation in wastewater treatment
Owned by: PARKSON CORPORATION
Serial Number: 74036296
STRAINPRESS
Filed: July 5, 1990
combination screen and compactor used in waste water treatment systems
Owned by: PARKSON CORPORATION
Serial Number: 74075665
BIO-REEL
Filed: November 7, 1990
waste water treatment plant equipment and parts therefor for the treatment of liquid and solid contaminants included in…
Owned by: PARKSON CORPORATION
Serial Number: 74113207
DYNACLEAR
Filed: November 27, 1991
water treatment services
Owned by: PARKSON CORPORATION
Serial Number: 74225882
ROTOPRESS
Filed: December 23, 1991
machines for de-watering and compressing solids which have been screened from a wastewater stream
Owned by: PARKSON CORPORATION
Serial Number: 74232856
SLUDGECLEANER
Filed: February 10, 1992
wastewater processing system
Owned by: PARKSON CORPORATION
Serial Number: 74244570
COMBI
Filed: September 8, 1992
combination septage receiving station and sand separator
Owned by: PARKSON CORPORATION
Serial Number: 74311798
GRITMEISTER
Filed: September 8, 1992
industrial waste water filtering units; namely, sand separator tanks
Owned by: PARKSON CORPORATION
Serial Number: 74311800
HELICON
Filed: September 8, 1992
wastewater treatment apparatus; namely, conveyors used to transport municipal and industrial pulp and paper-type solids
Owned by: PARKSON CORPORATION
Serial Number: 74311896
HELISIEVE
Filed: September 8, 1992
wastewater treatment apparatus; namely, an open-channel municipal and industrial wastewater prescreening sieve
Owned by: PARKSON CORPORATION
Serial Number: 74311898
HELICLEAN
Filed: June 14, 1993
wastewater treatment apparatus for solids, screening, and washing by means of a pump impeller installed in a channel
Owned by: PARKSON CORPORATION
Serial Number: 74401773
HELISIEVE PLUS
Filed: June 14, 1993
wastewater treatment apparatus; namely, a self-contained municipal and industrial wastewater prescreening sieve
Owned by: PARKSON CORPORATION
Serial Number: 74401774
HELICLEAN PLUS
Filed: July 6, 1993
self-contained wastewater treatment apparatus for solids screening and washing by means of a pump impeller
Owned by: PARKSON CORPORATION
Serial Number: 74408789
HELIXPRESS
Filed: September 13, 1993
wastewater treatment apparatus; namely, a dewatering press for solids
Owned by: PARKSON CORPORATION
Serial Number: 74434549
RETRO-CLAR
Filed: November 3, 1993
floating clarification device; namely, a unit for separation of solids and liquids in the waste water treatment industry
Owned by: PARKSON CORPORATION
Serial Number: 74456400
SPIRALKLEAN
Filed: May 9, 1994
machine for use in a waste water treatment system for the reduction of biological solid waste to a liquid
Owned by: PARKSON CORPORATION
Serial Number: 74522269
BIOGUARD
Filed: November 22, 1994
sewage influent cleaning machine
Owned by: PARKSON CORPORATION
Serial Number: 74601870
FUZZY FILTER
Filed: February 17, 1995
waste water treatment plants and parts therefor for the removal of solid contaminants included in municipal and industrial…
Owned by: PARKSON CORPORATION
Serial Number: 74635816
BIOFUSER
Filed: May 19, 1995
air diffuser used in wastewater treatment systems
Owned by: PARKSON CORPORATION
Serial Number: 74677266
BIOCELL
Filed: May 29, 1996
wastewater treatment system basin
Owned by: PARKSON CORPORATION
Serial Number: 75111468
CLEAN SQUEEZE
Filed: July 9, 1996
waste water treatment units and parts therefor for use in collecting, washing, compacting and drying solids for landfill…
Owned by: PARKSON CORPORATION
Serial Number: 75131396
HYDRO GRID
Filed: September 11, 1996
grid screens for industrial water treatment units for use in the removal of solid contaminants included in municipal and…
Owned by: PARKSON CORPORATION
Serial Number: 75164084
TRU-GRIT
Filed: October 28, 1996
waste water treatment apparatus, namely, sand washers
Owned by: PARKSON CORPORATION
Serial Number: 75188527
INTERCLAR
Filed: May 21, 1997
wastewater treatment systems comprised of basins, aeration diffusers and clarifier/settling tank
Owned by: PARKSON CORPORATION
Serial Number: 75295624
BIOCAM
Filed: September 9, 1997
wastewater treatment systems comprised of basins, aeration diffusers and clarifier/settling tank
Owned by: PARKSON CORPORATION
Serial Number: 75354283
SCHREIBER IMPROVING WATER THROUGH TECHNOLOGY
Filed: September 14, 1999
CONSTRUCTION OF WATER TREATMENT PLANTS AND PARTS THEREFOR FOR THE REMOVAL AND/OR REDUCTION OF CONTAMINANTS INCLUDED IN MUNICIPAL…
Owned by: PARKSON CORPORATION
Serial Number: 75798517
