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:
Nov. 20, 2007
Filed:
Jan. 21, 2005
Applicants:
Jeffrey D Langford, Lebanon, OR (US);
Ross E Friesen, Corvallis, OR (US);
Carrie E. Harris, Corvallis, OR (US);
Harold F Mantooth, Vancouver, WA (US);
Donald L Michael, Monmoth, OR (US);
Inventors:
Jeffrey D Langford, Lebanon, OR (US);
Ross E Friesen, Corvallis, OR (US);
Carrie E. Harris, Corvallis, OR (US);
Harold F Mantooth, Vancouver, WA (US);
Donald L Michael, Monmoth, OR (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/17 (2006.01); B41J 2/175 (2006.01);
U.S. Cl.
CPC ...
Abstract
A valve mechanism and a method for preparing an inkjet print cartridge and printer for inactivity is herein disclosed. Pressurized fluid is introduced to a standpipe volume to create a pressure differential that forces ink within the standpipe into an ink reservoir.