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:
Mar. 07, 1989
Filed:
Jul. 24, 1986
George D Wachob, State College, PA (US);
Robert W Rightnour, Mingoville, PA (US);
Rohm and Haas Co., Philadelphia, PA (US);
Abstract
A vacuum manifold for solid phase extraction of a plurality of liquid samples from reagent tubes removably connected by valves to a vacuum chamber through a removable vacuum tight cover closing. A plurality of parallel flow paths are provided through the cover for the flow of liquid samples into the vacuum chamber, through a plurality of valves rotatable about an axis parallel to the general direction of flow through the cover to provide flow adjustment and closing of the valves. A valve is also provided for attaching the vacuum chamber to a vacuum source to create a vacuum therein. An optional attachment is provided permitting treatment of materials with nitrogen or other gases using a manifold plate attached to a source of gas and providing a plurality of valve control means axially aligned to couple with the rotatable valves for passage of liquid into the vacuum chamber.