US 12,239,374 B2
Method of manufacturing a tear flow measurement device
Yu-Chong Tai, Pasadena, CA (US); Nicholas E. Scianmarello, Pasadena, CA (US); and Mark S. Humayun, Glendale, CA (US)
Assigned to California Institute of Technology, Pasadena, CA (US); and University of Southern California, Los Angeles, CA (US)
Filed by California Institute of Technology, Pasadena, CA (US); and University of Southern California, Los Angeles, CA (US)
Filed on Jun. 29, 2023, as Appl. No. 18/344,118.
Application 18/344,118 is a division of application No. 16/786,377, filed on Feb. 10, 2020, granted, now 11,730,358.
Claims priority of provisional application 62/806,182, filed on Feb. 15, 2019.
Prior Publication US 2023/0337906 A1, Oct. 26, 2023
Int. Cl. A61B 3/10 (2006.01); A61B 5/00 (2006.01); A61B 10/00 (2006.01); G01F 22/00 (2006.01); G01G 19/00 (2006.01); G01N 1/10 (2006.01); G01N 30/02 (2006.01); G01N 33/487 (2006.01)
CPC A61B 3/101 (2013.01) [A61B 5/6821 (2013.01); A61B 5/6867 (2013.01); A61B 10/0045 (2013.01); G01F 22/00 (2013.01); G01G 19/00 (2013.01); G01N 1/10 (2013.01); G01N 30/02 (2013.01); G01N 33/4875 (2013.01); A61B 2010/0067 (2013.01); G01N 2030/027 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of manufacturing a tear secretion measurement apparatus, the method comprising:
providing a polymer capillary tube having an inner diameter between 1 micron to 1000 microns (μm);
treating an inner surface of the capillary tube to be hydrophobic between an exit end of the capillary tube to 1 μm to 5000 μm from the exit end.