The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 18, 2025
Filed:
Dec. 10, 2020
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Nicholas L. Untiedt, Minneapolis, MN (US);
Paul B. Armstrong, St. Paul, MN (US);
Patricia M. Savu, Maplewood, MN (US);
Phillip E. Tuma, Faribault, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09B 57/02 (2006.01); C09B 69/10 (2006.01); G01M 3/20 (2006.01);
U.S. Cl.
CPC ...
C09B 57/02 (2013.01); C09B 69/109 (2013.01); G01M 3/20 (2013.01);
Abstract
Described herein is fluorinated dye comprising: a fluorescing coumarin-derived moiety connected to an oligomer of hexafluoropropylene oxide via a non-fluorinated divalent linking group. Such fluorinated dyes are soluble in fluorinated fluids and may be used to detect leaks in various systems such as refrigerant, air conditioning and/or heat transfer systems.