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. 21, 1981
Filed:
Dec. 28, 1979
Robert D Coffee, Dallas, TX (US);
Atlantic Richfield Company, Los Angeles, CA (US);
Abstract
In chromatography, the weight percent of higher boiling hydrocarbons is estimated by comparing areas under the certain segments of chromatograms. This procedure is subject to both human and equipment errors. A supplemental procedure for measuring the percent of higher boiling point hydrocarbons is disclosed. This procedure is specially related to chromatography and uses gradual heating and inert gas vaporization of the lower boiling point hydrocarbons in the sample material. In the procedure, a sample of the same hydrocarbon tested in the chromatograph is weighed and is heated to the same temperature as used in the chromatograph while flowing inert gas, e.g. helium, past the sample. After reaching this temperature, gas flow is continued for at least eight minutes. The residual sample is weighed and the difference used to determine and check the chromatograph estimation. The procedure may be checked with a calibrated sample of hydrocarbons boiling at and below the final maximum test temperature. The procedure may be performed simultaneously on both the unknown sample and the calibrated sample.