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:
Jan. 25, 2022
Filed:
Jun. 04, 2019
Applicant:
Hamamatsu Photonics K.k., Hamamatsu, JP;
Inventors:
Kyoichi Murayama, Hamamatsu, JP;
Ryotaro Matui, Hamamatsu, JP;
Yasumasa Hakamata, Hamamatsu, JP;
Koji Maejima, Hamamatsu, JP;
Assignee:
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 46/00 (2006.01); B01D 46/42 (2006.01); B01D 39/14 (2006.01); B01D 39/16 (2006.01);
U.S. Cl.
CPC ...
B01D 46/0002 (2013.01); B01D 39/14 (2013.01); B01D 46/42 (2013.01); B01D 2239/10 (2013.01);
Abstract
An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.