IP Library › Assignment 062613/0626
Patent Assignment
Reel/Frame 062613/0626

Assignment of Assignor's Interest

Recorded: 2023-02-07 Pages: 4
Assignors
LETTS, JOHN B.
Executed: 2019-02-14
YAO, CHUNHUA
Executed: 2019-02-12
HUBBARD, MICHAEL J.
Executed: 2019-02-15
Assignee
FIRESTONE BUILDING PRODUCTS COMPANY, LLC
200 4TH AVENUE SOUTH, NASHVILLE, TENNESSEE, 37201
Covered Property (1)
Process for Producing Isocyanate-Based Foam Construction Boards
Application: 17/521,192 →
Publication: US 2022/0056234
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: FIRESTONE BUILDING PRODUCTS COMPANY, LLC
To: HOLCIM TECHNOLOGY LTD
Reel/Frame 062613/0672 →
Assignment of Assignor's Interest Nov 25, 2025
From: HOLCIM TECHNOLOGY LTD
To: AMRIZE TECHNOLOGY SWITZERLAND LLC
Reel/Frame 073701/0847 →