Patent Assignment
Reel/Frame 067980/0625
Assignment of Assignor's Interest
Recorded: 2024-07-12
Pages: 4
Assignors
HU, YATAO RACHEL
Executed: 2020-03-26
SHAH, PARAG RASIKLAL
Executed: 2020-03-26
COLLOPY, DAVID GEORGE
Executed: 2020-03-09
PARKER, ROBERT JOSEPH
Executed: 2020-03-09
LEE, MYOUNG KIE
Executed: 2020-03-26
Assignee
PQ CORPORATION
P.O. BOX 840, VALLEY FORGE, PENNSYLVANIA, 19482-0840
Covered Property
(1)
Chromium-On-Silica Catalysts and Methods of Making the Same
Related Assignments
(12)
Other recorded transfers of the patent in this record — the chain of ownership.
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 056539/0903
Aug 5, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS ADMINISTRATIVE AGENT
To: PQ CORPORATION
Reel/Frame 057089/0255 →
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 →
Abl Patent Security Agreement
Aug 13, 2021
From: ECOVYST CATALYST TECHNOLOGIES LLC
To: CITIBANK, N.A., AS AGENT
Reel/Frame 057182/0449 →
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 →
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 →
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 →
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 →
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 →
Merger
Mar 12, 2026
From: ECOVYST US CATALYSTS LLC
To: ADVANCED MATERIALS & CATALYSTS LLC
Reel/Frame 074060/0841 →