Patent Assignment
Reel/Frame 062613/0672
Assignment of Assignor's Interest
Recorded: 2023-02-07
Pages: 5
Assignor
FIRESTONE BUILDING PRODUCTS COMPANY, LLC
Executed: 2022-04-04
Assignee
HOLCIM TECHNOLOGY LTD
GRAFENAUWEG 10, 6300 ZUG, SWITZERLAND
Covered Property
(1)
Process for Producing Isocyanate-Based Foam Construction Boards
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Feb 7, 2023
From: LETTS, JOHN B.; YAO, CHUNHUA; HUBBARD, MICHAEL J.
To: FIRESTONE BUILDING PRODUCTS COMPANY, LLC
Reel/Frame 062613/0626 →
Assignment of Assignor's Interest
Nov 25, 2025
From: HOLCIM TECHNOLOGY LTD
To: AMRIZE TECHNOLOGY SWITZERLAND LLC
Reel/Frame 073701/0847 →