Patent Assignment
Reel/Frame 035798/0278
Assignment of Assignor's Interest
Recorded: 2015-06-06
Pages: 3
Assignors
SHAH, PARAG RASIKLAL
Executed: 2010-06-24
HU, YATAO RACHEL
Executed: 2010-06-24
LEE, MYOUNG KIE
Executed: 2010-06-24
Assignee
PQ CORPORATION
300 LINDENWOOD DRIVE, VALLEYBROOKE CORPORATE CENTER, MALVERN, PENNSYLVANIA, 19355-1740
Covered Property
(1)
Catalyst Supports, Catalysts and Their Manufacture and Use
Related Assignments
(21)
Other recorded transfers of the patent in this record — the chain of ownership.
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 →
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 →
Term Loan Patent Security Agreement
Jun 10, 2021
From: PQ CORPORATION
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS AGENT
Reel/Frame 056539/0903 →
Assignment of Assignor's Interest
Aug 3, 2021
From: PQ CORPORATION
To: ECOVYST CATALYST TECHNOLOGIES LLC
Reel/Frame 057140/0261 →
Partial Release of Security Interest in Patents Recorded at R/F 038861/0071
Aug 5, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
To: PQ CORPORATION
Reel/Frame 057089/0345 →
Partial Release of Security Interest in Patents Recorded at R/F 056539/0903
Aug 5, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
To: PQ CORPORATION
Reel/Frame 057089/0255 →
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 →
Corrective Assignment to Correct the Conveying Party Name Previously Recorded at Reel: 057089 Frame: 0345. Assignor(S) Hereby Confirms the Release of Security Interest.
Aug 6, 2021
From: CITIBANK, N.A., AS COLLATERAL AGENT
To: PQ CORPORATION
Reel/Frame 057109/0688 →
Abl Patent Security Agreement
Aug 13, 2021
From: ECOVYST CATALYST TECHNOLOGIES LLC
To: CITIBANK, N.A., AS AGENT
Reel/Frame 057182/0449 →
Term Loan Patent Security Agreement
Aug 13, 2021
From: ECOVYST CATALYST TECHNOLOGIES LLC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
Reel/Frame 057182/0552 →
Merger
Jul 15, 2024
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 068321/0831 →
Confirmation of Division
Dec 22, 2025
From: ECOVYST CATALYST TECHNOLOGIES LLC
To: ECOVYST US CATALYSTS LLC
Reel/Frame 074023/0497 →
Abl Patent Security Agreement Supplement No. 2
Dec 23, 2025
From: ECOVYST US CATALYSTS LLC
To: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 074050/0133 →
Term Loan Patent Security Agreement
Dec 23, 2025
From: ECOVYST US CATALYSTS LLC
To: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
Reel/Frame 074050/0311 →
Release of Security Interest
Jan 2, 2026
From: UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT
To: ECOVYST CATALYST TECHNOLOGIES LLC; ECOVYST US CATALYSTS LLC
Reel/Frame 073351/0633 →
Release of Security Interest
Jan 2, 2026
From: CITIBANK, N.A., AS ADMINISTRATIVE AGENT
To: ECOVYST CATALYST TECHNOLOGIES LLC; ECOVYST US CATALYSTS LLC
Reel/Frame 073351/0549 →
Merger
Mar 12, 2026
From: ECOVYST US CATALYSTS LLC
To: ADVANCED MATERIALS & CATALYSTS LLC
Reel/Frame 074060/0841 →