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. 15, 1997
Filed:
Jun. 07, 1995
Howard H Weetall, Rockville, MD (US);
Kristian P Helmerson, Germantown, MD (US);
Roni B Kishore, North Potomac, MD (US);
United States of America, as represented by the Secretary of Commerce, Washington, DC (US);
Abstract
Tightly focused beams of laser light are used as 'optical tweezers' to trap and manipulate polarizable objects such as microspheres of glass or latex with diameters on the order of 4.5 .mu.m. When analytes are allowed to adhere to the microspheres, small quantities of these analytes can be manipulated, thus allowing their detection and quantitation even when amounts and concentrations of the analytes are extremely small. Illustrative examples include measuring the strength needed to break antibody-antigen bonds and the detection of DNA sequences.