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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.:

US 4688938 B1

PDFFull Text
Date of Patent:
Aug. 25, 1987

Filed:

Dec. 04, 1985

Method and apparatus for determining the contact angle of a drop of

Applicant:
Inventors:

Catherine A Demoulin, Sceaux, FR;

Dominique Ausserre, Le Plessis Robinson, FR;

Francis Rondelez, Antony, FR;

Assignee:

Centre National de la Recherche Scientifique (C.N.R.S.), Paris, FR;

Attorney:

Pollock, Vande Sande & Priddy

Primary Examiner:

R A Rosenberger

Assistant Examiner:

Crystal D Cooper

Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356154 ; 356138 ;
Abstract

A support (56) is suitable for holding a substrate (10) horizontal, said substrate having a drop of liquid placed thereon. A source of light (74) associated with a collimator (78) forms a primary beam of parallel light which is directed perpendicularly (86) to the substrate. A receiver surface (126, 128) having a known geometry and placed in a known position relative to the substrate intercepts a secondary beam (124) produced by interaction between the primary beam and the drop and the substrate. The value of the contact angle between the drop and the substrate may be deduced from the illuminated zone on said receiver surface.

Find Patent Forward Citations

Demoulin, Catherine. (1987). Method and apparatus for determining the contact angle of a drop of (U.S. Patent No. 4688938). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4688938

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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