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:
Sep. 17, 2002
Filed:
Dec. 28, 1999
David C. Boris, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method and apparatus are provided for the measuring osmotic pressure of a solution. A sample of a solution is placed into a sample cell above a membrane supported in the sample cell and the sample cell is sealed. Gas at an elevated pressure is introduced into the sample cell to drive a quantity of dialyzate through the membrane and into a transparent dialyzate exit tube adapted to receive the dialyzate which passes through the membrane. The elevated pressure of the gas is varied through a pressure regulator to yield a substantially stationary dialyzate meniscus in the transparent dialyzate exit tube. The pressure in the sample cell is measured by reading a pressure gauge showing the elevated pressure of the gas that yielded the substantially stationary dialyzate meniscus, the elevated pressure of the gas being substantially equivalent to the osmotic pressure of the sample.