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:
Feb. 02, 2021
Filed:
Apr. 30, 2019
Hewlett-packard Development Company, L.p., Fort Collins, CO (US);
Benjamin H. Wood, San Diego, CA (US);
Paul Mark Haines, Lebanon, OR (US);
Angela W. Bakkom, Corvallis, OR (US);
Anjan Prabhat Pattathil, Singapore, SG;
Franklin D. Derryberry, Corvallis, OR (US);
Hewlett-Packard Development Company, L.P., Spring, TX (US);
Abstract
A fluid ejection and circulation apparatus may include a fluid ejection die, the pressure regulator, a first standpipe, a second standpipe and a crossflow passage. The pressure regulator has a fluid chamber. The first standpipe is between the fluid chamber and the fluid ejection die. The first standpipe has a first port above the fluid ejection die. The second standpipe extends alongside the first standpipe. The second standpipe has a second port above the fluid ejection die. The crossflow passage connects the first standpipe and the second standpipe.