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:
Feb. 02, 1993
Filed:
Oct. 11, 1990
Humayun Qureshi, Wayland, MA (US);
Donald Schwartz, Marblehead, MA (US);
DRD Diluter Corporation, Danvers, MA (US);
Abstract
A method of metering and dispensing a first liquid, using a probe having an aspiration tip defining a tip chamber. The aspiration tip chamber is sized so as to be capable of holding and metering at least two largely different volumes of a first liquid. In the method a filler liquid is introduced into a portion of the chamber and a first liquid is aspirated in a predetermined amount into the chamber, so that a predetermined amount of the first liquid can be metered and dispensed with high accuracy and precision. The chamber is capable of being used for two largely different doses of the first liquid. Additional liquids can be aspirated along with the filler liquid. The filler using can be a reactant, a cleaner or the like.