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:
Jul. 20, 2004
Filed:
Jan. 31, 2002
Jeremy Donaldson, Corvallis, OR (US);
Naoto A. Kawamura, Corvallis, OR (US);
Daniel A. Kearl, Philomath, OR (US);
Donald J. Milligan, Corvallis, OR (US);
J. Daniel Smith, Corvallis, OR (US);
Martha A. Truninger, Corvallis, OR (US);
Diane Lai, Corvallis, OR (US);
Norman L. Johnson, Corvallis, OR (US);
William Edwards, Albany, OR (US);
Sadiq Bengali, Corvallis, OR (US);
Timothy R. Emery, Corvallis, OR (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
In one embodiment, a fluid ejection device comprises a substrate having a fluid slot defined from a first surface through to a second opposite surface; an ejection element formed over the first surface and that ejects fluid therefrom; and a filter having feed holes positioned over the fluid slot near the first surface. Fluid moves from the second surface through the feed holes to the ejection element. In a particular embodiment, the filter is formed of a first material that is surrounded by a second material. In another particular embodiment, the filter is formed from the back side and is formed of the same material as the substrate.