Patent Assignment
Reel/Frame 075312/0234
Release of Security Interest
Recorded: 2026-05-01
Pages: 35
Assignor
PNC BANK, NATIONAL ASSOCIATION
Executed: 2026-04-20
Assignees
AQUATECH INTERNATIONAL CORPORATION
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
QUA GROUP, LLC
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
AQUATECH INTERNATIONAL SALES CORPORATION
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
AQUATECH INTERNATIONAL, LLC
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
AQUATECH ENERGY SERVICES, LLC N/K/A AQUATECH ENVIRONMENTAL SERVICES, LLC
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
ALVEUS HOLDINGS, INC.
ONE-FOUR COINS DRIVE, CANONSBURG, PENNSYLVANIA, 15317
Covered Properties
(60)
Low Energy Reverse Osmosis Process
Application:
14/601,788 →
Publication:
US 2015/0129495
Split Flow Edi Apparatus for Treating Second Pass Ro Permeate Water with High Flow Rate
Method and Apparatus for Recycling Water
Method for Recycling Deoiled Water Using Counterflow Falling-Film Evaporators
Neutralization and Precipitation of Silica from High Ph Brines
Application:
13/561,258 →
Publication:
US 2013/0193077
Process for Purification of Produced Water
Water Treatment Process
Application:
14/650,422 →
Publication:
US 2015/0315055
Reject Recovery Reverse Osmosis (R2RO)
Application:
14/520,650 →
Publication:
US 2016/0052812
Settling Chamber for Separation of Large, Plugging Particles Upstream of a Hydroclone
Application:
13/745,303 →
Publication:
US 2013/0186576
Enhanced Membrane Bioreactor Process for Treatment of Wastewater
Application:
15/563,172 →
Publication:
US 2018/0093908
Method and Apparatus for Advanced Vacuum Membrane Distillation
Method and Apparatus for Gasification Wastewater Treatment
Application:
16/535,811 →
Publication:
US 2020/0048128
Method and Apparatus for Mitigating Bio Fouling in Reverse Osmosis Membranes
Application:
15/751,780 →
Publication:
US 2018/0221827
Method and Apparatus for Sodium Chloride Recovery from a Mixed Salt Stream
Application:
16/372,936 →
Publication:
US 2020/0317535
Method of Treating High Strength Wastewater by Anaerobic Bio Reactor
Salt Production from Wastewater
Advanced Filtration Device for Water and Wastewater Treatment
Application:
61/319,339 →
Electro Deionization Apparatus for Treating Second Pass Ro Permeate Water with High Flow Rate
Application:
61/428,413 →
Process for Purification of Water from Steamflood Process
Application:
61/611,806 →
Process for Purification of Water from Steamflood Process
Application:
61/699,524 →
Reverse Osmosis Enhanced Recovery Hybrid Process
Application:
61/086,196 →
Reverse Osmosis Enhanced Recovery Hybrid Process
Application:
12/536,303 →
Publication:
US 2010/0032375
Enhanced Membrane Bioreactor Process for Treatment of Wastewater
Application:
62/191,748 →
Method and Apparatus for Submerged Vacuum Membrane Distillation
Application:
62/191,720 →
Biofoulant Removal Filter and Method of Use
Application:
62/203,317 →
Fractional Deionization Process
Fractional Deionization Process
Method and Apparatus for High Efficiency Evaporation Operation
Method for Production of High Pressure Steam from Produced Water
Method for Preparing an Ion Exchange Media
Method for Preparing an Ion Exchange Media
Preparation of High Performance Ultra Filtration Hollow Fiber Membrane
Preparation of High Performance Ultra Filtration Hollow Fiber Membrane
Method for Treatment of High Ph/Silica Brines
Method for Production of High Purity Distillate from Produced Water for Generation of High Pressure Steam
Method for Production of High Purity Distillate from Produced Water for Generation of High Pressure Steam
Advanced Filtration Device for Water and Wastewater Treatment
Low Energy Reverse Osmosis Process
Method for Recycling Deoiled Water Using Counterflow Falling-Film Evaporators
Method and Apparatus for Recycling Water
Method and Apparatus for Selenium Removal from High Tds Wastewater
Method and Apparatus for Selenium Removal from High Tds Wastewater
Process for Purification of Produced Water
Process for Purification of Produced Water
Split Flow Edi Apparatus for Treating Second Pass Ro Permeate Water with High Flow Rate
Low Energy Reverse Osmosis Process
PCT:
PCT/US2013/037744 ↗
Method and Apparatus for Recycling Water
PCT:
PCT/US2013/075973 ↗
Water Treatment Process
PCT:
PCT/US2013/071236 ↗
Settling Chamber for Separation of Large, Plugging Particles Upstream of a Hydroclone
PCT:
PCT/US2013/022181 ↗
Preparation of High Performance Ultra Filtration Hollow Fiber Membrane
PCT:
PCT/US2009/046851 ↗
Method for Treatment of High Ph Silica Brines
PCT:
PCT/US2008/069158 ↗
Method for Production of High Purity Distillate from Produced Water for Generation of High Pressure Steam
PCT:
PCT/US2010/044558 ↗
Method for Treatment and Purification of Seawater to Recover High Purity Sodium Chloride for Industrial Usage
PCT:
PCT/US2010/035628 ↗
Advanced Filtration Device for Water and Wastewater Treatment
PCT:
PCT/US2011/024189 ↗
Split Flow Edi Apparatus for Treating Second Pass Ro Permeate Water with High Flow Rate
PCT:
PCT/US2011/054585 ↗
Method for Recycling Deoiled Water Using Counterflow Falling-Film Evaporators
PCT:
PCT/US2011/064406 ↗
Reverse Osmosis Enhanced Recovery Hybrid Process
PCT:
PCT/US2009/052863 ↗
Enhanced Membrane Bioreactor Process for Treatment of Wastewater
PCT:
PCT/US2016/025331 ↗
Method and Apparatus for Advanced Vacuum Membrane Distillation
PCT:
PCT/US2016/028927 ↗
Method and Apparatus for Mitigating Bio Fouling in Reverse Osmosis Membranes
PCT:
PCT/US2016/046343 ↗
Related Assignments
(25)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jul 28, 2004
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; SHARMA, DEVESH
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 014906/0874 →
Security Agreement
Aug 31, 2006
From: AQUATECH INTERNATIONAL CORPORATION
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 018194/0384 →
Assignment of Assignor's Interest
Sep 29, 2009
From: JAGANNATHAN, VENKATARAMAN; CHIDAMBARAN, RAVI; SHARMA, MANOJ
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 023296/0241 →
Assignment of Assignor's Interest
May 25, 2010
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; DAS, SUGATA
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 024435/0067 →
Assignment of Assignor's Interest
Dec 21, 2011
From: CHIDAMBARAN, RAVI; BISHT, NARENDRA SINGH; RAINA, PAVAN
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 027423/0767 →
Assignment of Assignor's Interest
Dec 21, 2011
From: BJORKLUND, DANIEL P.; KERSEY, DAVID; MANDIGO, GREGORY J.; TIWARI, CHANDRAKANT
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 027423/0435 →
Assignment of Assignor's Interest
Feb 5, 2013
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; BISHT, NARENDRA SINGH
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 029755/0835 →
Acknowledgement of Security Interest in Patents
Mar 12, 2014
From: AQUATECH INTERNATIONAL CORPORATION; QUA GROUP, LLC; AQUATECH INTERNATIONAL SALES CORPORATION
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 032438/0071 →
Assignment of Assignor's Interest
Aug 26, 2014
From: CHIDAMBARAN, RAVI; BISHT, NARENDRA SINGH; RAINA, PAVAN
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 033608/0528 →
Assignment of Assignor's Interest
Dec 11, 2014
From: CHIDAMBARAN, RAVI; MITTAL, ARUN; SARKAR, AJANTA
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 034476/0155 →
Assignment of Assignor's Interest
Jan 22, 2015
From: CHIDAMBARAN, RAVI
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 034781/0968 →
Assignment of Assignor's Interest
Jun 4, 2015
From: MANDIGO, GREGORY J; BJORKLUND, DANIEL
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 035783/0483 →
Acknowledgement of Security Interest in Patents
Jul 10, 2015
From: AQUATECH INTERNATIONAL CORPORATION; QUA GROUP, LLC; AQUATECH INTERNATIONAL SALES CORPORATION
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 036089/0047 →
Assignment of Assignor's Interest
Jul 15, 2015
From: CHIDAMBARAN, RAVI; SINGH BISHT, NARENDRA; RAINA, PAVAN
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 036096/0252 →
Assignment of Assignor's Interest
May 6, 2016
From: CHIDAMBARAN, RAVI
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 038486/0176 →
Amended and Restated Patent, Trademark and Copyright Security Agreement
Jan 17, 2017
From: AQUATECH INTERNATIONAL, LLC; QUA GROUP, LLC; AQUATECH INTERNATIONAL SALES CORPORATION; AQUATECH ENERGY SERVICES, LLC
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 041380/0058 →
Change of Name
Jun 30, 2017
From: AQUATECH INTERNATIONAL CORPORATION
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 043072/0139 →
Assignment of Assignor's Interest
Jul 18, 2018
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; SINGH BISHT, NARENDRA; VENKATESH BHINGE, SANTOSH
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 046380/0957 →
Assignment of Assignor's Interest
Feb 27, 2019
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; CHANDAN, NITIN
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 048452/0959 →
Assignment of Assignor's Interest
Mar 5, 2019
From: BJORKLUND, DANIEL P.; RAJE, VINOD A.; MARLETT, JAMES M.; BACKLIWAL, MANISH
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 048505/0974 →
Assignment of Assignor's Interest
Mar 11, 2019
From: CHIDAMBARAN, RAVI
To: AQUATECH INTERNATIONAL CORPORATION
Reel/Frame 048557/0241 →
Assignment of Assignor's Interest
Aug 8, 2019
From: BJORKLUND, DANIEL P.; MANDIGO, GREGORY J.; GLOVER, GARRY D.
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 050003/0614 →
Change of Name
Nov 10, 2020
From: AQUATECH INTERNATIONAL CORPORATION
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 054853/0714 →
Assignment of Assignor's Interest
Jan 19, 2021
From: CHIDAMBARAN, RAVI; RAINA, PAVAN; CHANDAN, NITIN; CHAWANDE, SNEHA SURYAKANT
To: AQUATECH INTERNATIONAL, LLC
Reel/Frame 054955/0823 →
Second Amended and Restated Patent, Trademark and Copyright Security Agreement
Mar 25, 2021
From: AQUATECH INTERNATIONAL, LLC; QUA GROUP, LLC; AQUATECH INTERNATIONAL SALES CORPORATION; AQUATECH ENERGY SERVICES, LLC
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 055736/0491 →