US 11,702,551 B2
Infrared fluorescent coatings
Michael A. Zalich, Wexford, PA (US); Paul H. Berdahl, Walnut Creek, CA (US); and Stuart D. Hellring, Pittsburgh, PA (US)
Assigned to The Regents of the University of California, Oakland, CA (US); and PPG Industries Ohio, Inc., Cleveland, OH (US)
Filed by PPG Industries Ohio, Inc., Cleveland, OH (US); and The Regents of the University of California, Oakland, CA (US)
Filed on May 26, 2022, as Appl. No. 17/825,623.
Application 17/825,623 is a continuation of application No. 16/067,537, granted, now 11,370,925, previously published as PCT/US2016/059336, filed on Oct. 28, 2016.
Claims priority of provisional application 62/272,377, filed on Dec. 29, 2015.
Claims priority of provisional application 62/272,391, filed on Dec. 29, 2015.
Claims priority of provisional application 62/272,357, filed on Dec. 29, 2015.
Prior Publication US 2022/0298362 A1, Sep. 22, 2022
Int. Cl. C09D 5/33 (2006.01); C09D 7/62 (2018.01); B05D 5/06 (2006.01); B05D 7/00 (2006.01); C09K 11/02 (2006.01); C09K 11/55 (2006.01); C09K 11/58 (2006.01); C09K 11/59 (2006.01); C09D 5/22 (2006.01); C09D 127/16 (2006.01); C09K 11/06 (2006.01); C09K 11/68 (2006.01); G01N 21/64 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01)
CPC C09D 5/004 (2013.01) [B05D 5/063 (2013.01); B05D 7/52 (2013.01); B05D 7/546 (2013.01); C09D 5/22 (2013.01); C09D 7/62 (2018.01); C09D 127/16 (2013.01); C09K 11/02 (2013.01); C09K 11/06 (2013.01); C09K 11/55 (2013.01); C09K 11/58 (2013.01); C09K 11/59 (2013.01); C09K 11/592 (2013.01); C09K 11/685 (2013.01); G01N 21/6428 (2013.01); C08K 3/013 (2018.01); C08K 5/0041 (2013.01); G01N 2021/6439 (2013.01)] 20 Claims
 
1. A method of detecting an object in a path of an autonomous vehicle, comprising:
directing infrared electromagnetic radiation from a radiation source mounted on an autonomous vehicle at an object at least partially coated with a coating composition comprising: (i) a film-forming resin, (ii) an infrared reflective pigment, and (iii) an infrared fluorescent pigment or dye different from the infrared fluorescent pigment; and
detecting, by a radiation sensor mounted on the autonomous vehicle, reflected and fluoresced radiation emitted by the infrared reflective pigment and the infrared fluorescent pigment in response to excitation by incident radiation from the infrared electromagnetic radiation.