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:
May. 20, 1997
Filed:
Mar. 23, 1995
Raymond C Rowe, Congleton, GB;
Zeneca Limited, London, GB;
Abstract
A method of administering to the eye a liquid ophthalmic formulation, comprising an ophthalmologically acceptable liquid and optionally containing an ophthalmologically-active substance, characterized in that the formulation has a viscosity in the range 10.sup.-3 to 1.0 Pa.s and a resistivity lower than 10.sup.4 ohm.cm, and that a jet of the formulation is ejected towards the eye, from a spray nozzle situated adjacent to a piezoelectric or electromagnetic transducer, to form a stream of uniformly-sized, equally spaced, uncharged droplets, the stream of uncharged droplets is subsequently directed past a charging electrode to induce an electric charge on each droplet in the stream, and the charged droplets discharge their electric charge by earthing on contact with the eye; and spraying apparatus suitable for use in that method.