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:
Apr. 10, 1979
Filed:
May. 04, 1977
Winfried Kern, Erftstadt, DE;
Wilhelm Valentin, Erftstadt, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Interfacial phenomena are observed employing an electronically compensated vacuum micro-balance for weighing the specimen mixture under observation. The gas pressure in the vacuum micro-balance is determined by means of a buoyancy element. During the weighing operation the weights of the specimen and of the buoyancy element and also the temperature of the specimen are determined at intervals of 0.1 to 60 seconds. The measured values thus obtained are supplied to converters whereby they are converted into initial values which are computer-readable. The measured values thus converted are stored intermediately in a computer, successive values being compared with one another until 2 to 50 successive values of the weight of the specimen differ from one another by less than 50.gamma. 1 .gamma. means 10.sup.-6 g. The result of this latter specimen weight comparison, together with the values of the gas pressure and of the temperature, is printed out by a printer connected to the computer. Thereafter the above-mentioned observations are repeated, in accordance with a program stored in the said computer for the control and monitoring of the observations in conformity with predetermined instructions and conditions.