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:
Oct. 30, 2018
Filed:
Mar. 31, 2010
James A. Feinn, San Diego, CA (US);
Albert Nagao, Corvallis, OR (US);
Thomas R. Strand, Corvallis, OR (US);
David R. Thomas, Corvallis, OR (US);
Erik D. Tomiainen, Albany, OR (US);
Lawrence H. White, Corvallis, OR (US);
James A. Feinn, San Diego, CA (US);
Albert Nagao, Corvallis, OR (US);
Thomas R. Strand, Corvallis, OR (US);
David R. Thomas, Corvallis, OR (US);
Erik D. Tomiainen, Albany, OR (US);
Lawrence H. White, Corvallis, OR (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
An inkjet nozzle includes an aperture with a noncircular opening substantially defined by a polynomial equation. A droplet generator is also described which includes a firing chamber fluidically coupled to a fluid reservoir, a heating resistor and a nozzle. The nozzle includes an aperture forming a passage from the firing chamber to the exterior of the droplet generator through a top hat layer. The nozzle is defined by a closed polynomial and has a mathematically smooth and mathematically continuous shape around aperture's perimeter wall, with two protrusions extending into the center of the aperture.