Peter J. Petit — 25 Patents at Envirex

Peter J. Petit has been granted 25 US patents while listed as an inventor at Envirex. The first was granted in 1983 and the most recent in October 2025. Peter J. Petit ranks #158,593 of 4,157,543 US inventors in our database (top 3.8%). Patent records list Peter J. Petit in Pewaukee, WI, US.

Issued Patents All Time

Showing 1–25 of 25 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12454859	Two-stage hermetic seal and process of making same	—	2025-10-28
10822864	Compliant hermetic seal system for flat glass panel assembly	—	2020-11-03
10207210	High flow disc filter	William E. Davis	2019-02-19	$18,232,000
9366071	Low-friction spacer system for vacuum insulated glass	—	2016-06-14
9339745	Trash tolerant filter support for a disc filter	William E. Davis	2016-05-17
9028692	High flow disc filter	William E. Davis	2015-05-12
9023208	Disc filter	William E. Davis	2015-05-05
8808542	Disc filter	William E. Davis	2014-08-19
8801929	Trash tolerant filter support for a disc filter	William E. Davis	2014-08-12
8118175	Venting device for a disc filter	William E. Davis	2012-02-21	$656,000
7862014	Hybrid diffuser system headloss balancing	John Lechner, Lawrence B. Ratzlow	2011-01-04	$874,000
7569147	Screening of inert solids from a low-yield wastewater treatment process	Betty-Ann Curtis, Marc E. Roehl, Michael L. Doyle	2009-08-04	$1,498,000
7243912	Aeration diffuser membrane slitting pattern	Tieniu Chen	2007-07-17
5976365	Biomass growth control apparatus for fluid bed biological reactor	—	1999-11-02
5766491	Backflow prevention system for media bed reactor	Eugene E. Mazewski, Robert Hines	1998-06-16
5766484	Dissolved gas floatation device	William H. Boyle, Charles S. Applegate	1998-06-16
5538635	Method for dissolving gas in liquid including pressurized bubble contactor in sidestream	Eugene E. Mazewski, Richard E. Speece	1996-07-23
5454938	Bed height sensing device for biological reactor	Michael L. Doyle, Eugene E. Mazewski	1995-10-03
5411660	Apparatus for dissolving gas in liquid including pressurized bubble contactor in sidestream	Eugene E. Mazewski, Richard E. Speece	1995-05-02
5372712	Biomass growth control apparatus for fluid bed biological reactor	—	1994-12-13
5296201	Apparatus for venting a pressurized bubble contactor	—	1994-03-22
5296200	Apparatus for venting excess gas bubbles from a bubble contactor	—	1994-03-22
4378974	Start-up method for coal gasification plant	Khosrow Farnia	1983-04-05	$696,000
4373908	Kiln shell nozzle with annular fluid delivery	Walter J. Hartwig	1983-02-15	$569,000
4373909	Gas injecting kiln shell nozzle with particle entry barriers	Thomas J. Gill	1983-02-15	$569,000

Peter J. Petit — 25 Patents

Issued Patents All Time

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