Patent Assignment
Reel/Frame 073351/0549
Release of Security Interest
Recorded: 2026-01-02
Pages: 9
Assignor
CITIBANK, N.A., AS ADMINISTRATIVE AGENT
Executed: 2025-12-31
Assignees
ECOVYST CATALYST TECHNOLOGIES LLC
300 LINDENWOOD DRIVE, MALVERN, PENNSYLVANIA, 19355
ECOVYST US CATALYSTS LLC
300 LINDENWOOD DRIVE, MALVERN, PENNSYLVANIA, 19355
Covered Properties
(23)
Novel Microporous Crystalline Material Comprising a Molecular Sieve or Zeolite Having an 8-Ring Pore Opening Structure and Methods of Making and Using Same
Novel Iron-Containing Aluminosilicate Zeolites and Methods of Making and Using Same
Novel Microporous Crystalline Material Comprising a Molecular Sieve or Zeolite Having an 8-Ring Pore Opening Structure and Methods of Making and Using Same
High Silica Chabazite for Selective Catalytic Reduction, Methods of Making and Using Same
Novel Iron-Containing Aluminosilicate Zeolites and Methods of Making and Using Same
Stabilized Microporous Crystalline Material, the Method of Making the Same, and the Use for Selective Catalytic Reduction of Nox
Stabilized Microporous Crystalline Material, the Method of Making the Same, and the Use for Selective Catalytic Reduction of Nox
Catalyst Supports, Catalysts and Their Manufacture and Use
Small Crystal Ferrierite and Method of Making the Same
Zeolite Y
STABILIZED MICROPOROUS CRYSTALLINE MATERIAL, THE METHOD OF MAKING THE SAME, AND THE USE FOR SELECTIVE CATALYTIC REDUCTION OF NOx
Novel Metal-Containing Zeolite Beta for Nox Reduction and Methods of Making the Same
Production of Hydrothermally Stable Cha Zeolites
Low-Silica Chabazite Zeolites with High Acidity
Direct Synthesis of Metal-Containing Cha Zeolites
Chromium-On-Silica Catalysts and Methods of Making the Same
Chabazite Zeolite Synthesis with Organic Templates
Chabazite Zeolite Synthesis with Combined Organic Templates
Application:
17/531,228 →
Publication:
US 2022/0162081
Method for Manufacturing a Supported Tantalum Catalyst
Desilicated Small Crystal Zsm-5 and Method of Making the Same
Application:
18/184,030 →
Publication:
US 2023/0365420
Chromium-On-Silica Catalysts and Methods of Making the Same
Method of Preparing a Titanium-Modified Cr/Silica Catalyst
Application:
18/728,411 →
Publication:
US 2025/0154295
Method for Manufacturing a Supported Tantalum Catalyst
Related Assignments
(25)
Other recorded transfers of the patents in this record — the chain of ownership.
First Lien Grant of Security Interest in Patents Amendment No. 1
Apr 3, 2012
From: PQ CORPORATION
To: CREDIT SUISSE AG, AS SUCCESSOR AGENT
Reel/Frame 027980/0194 →
Second Lien Grant of Security Interest in Patents Amendment No. 1
Apr 3, 2012
From: PQ CORPORATION
To: CREDIT SUISSE AG, AS SUCCESSOR AGENT
Reel/Frame 027980/0219 →
Release of Security Interest in Patents
Nov 26, 2012
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: PQ CORPORATION
Reel/Frame 029349/0556 →
Release of Security Interest in Patents
Nov 26, 2012
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH
To: PQ CORPORATION
Reel/Frame 029349/0592 →
Security Agreement
Nov 29, 2012
From: PQ CORPORATION; POTTERS INDUSTRIES, LLC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
Reel/Frame 029370/0103 →
Security Agreement
Nov 30, 2012
From: PQ CORPORATION; POTTERS INDUSTRIES, LLC
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
Reel/Frame 029377/0878 →
Assignment of Assignor's Interest
May 15, 2013
From: LI, HONG-XIN; MODEN, BJORN; CORMIER, WILLIAM E.
To: PQ CORPORATION
Reel/Frame 030417/0909 →
Assignment of Assignor's Interest
May 15, 2013
From: LI, HONG-XIN; MODEN, BJORN; CORMIER, WILLIAM E.
To: PQ CORPORATION
Reel/Frame 030422/0686 →
Assignment of Assignor's Interest
Jan 17, 2014
From: PETUSHKOV, ANTON; LI, HONG-XIN; CORMIER, WILLIAM E.
To: PQ CORPORATION
Reel/Frame 031996/0530 →
Assignment of Assignor's Interest
Jul 1, 2014
From: COOPER, DAVID ALLEN; OUWEHAND, CORNELIS; DOMOKOS, LASZLO; ONG, LAY HWA
To: PQ CORPORATION
Reel/Frame 033222/0043 →
Assignment of Assignor's Interest
Jun 6, 2015
From: SHAH, PARAG RASIKLAL; HU, YATAO RACHEL; LEE, MYOUNG KIE
To: PQ CORPORATION
Reel/Frame 035798/0278 →
Assignment of Assignor's Interest
Apr 27, 2016
From: LI, HONG-XIN; CORMIER, WILLIAM E.; MODEN, BJORN
To: PQ CORPORATION
Reel/Frame 038391/0857 →
Release of Security Interest
May 4, 2016
From: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
To: PQ CORPORATION; POTTERS INDUSTRIES, LLC
Reel/Frame 038611/0927 →
Release of Security Interest
May 5, 2016
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
To: PQ CORPORATION; POTTERS INDUSTRIES, LLC
Reel/Frame 038612/0222 →
Patent Security Agreement (Abl)
Jun 1, 2016
From: PQ CORPORATION
To: CITIBANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038861/0071 →
Patent Security Agreement (Term)
Jun 1, 2016
From: PQ CORPORATION
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 038860/0900 →
Patent Security Agreement (Notes)
Jun 1, 2016
From: PQ CORPORATION
To: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 038860/0012 →
Security Interest
Jul 22, 2020
From: PQ CORPORATION
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 053281/0474 →
Release of Security Interest at R/F 38860/0012
Jul 22, 2020
From: WELLS FARGO BANK, N.A., AS COLLATERAL AGENT
To: PQ CORPORATION
Reel/Frame 053281/0616 →
Term Loan Patent Security Agreement
Jun 10, 2021
From: PQ CORPORATION
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS AGENT
Reel/Frame 056539/0903 →
Release of Security Interest in Patents at R/F 053281/0474
Jun 10, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
To: PQ CORPORATION
Reel/Frame 056539/0782 →
Assignment of Assignor's Interest
Jun 11, 2021
From: LI, HONG-XIN; PETUSHKOV, ANTON; MODEN, BJORN; WANG, LIFENG
To: PQ CORPORATION
Reel/Frame 056513/0467 →
Assignment of Assignor's Interest
Jun 11, 2021
From: PACHECO, JOSHUA; MODEN, BJORN
To: PQ CORPORATION
Reel/Frame 056513/0760 →
Assignment of Assignor's Interest
Aug 3, 2021
From: PQ CORPORATION
To: ECOVYST CATALYST TECHNOLOGIES LLC
Reel/Frame 057140/0261 →
Release of Security Interest in Patents Recorded at R/F 038860/0900
Aug 5, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
To: PQ CORPORATION
Reel/Frame 057089/0382 →