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. 06, 2003
Filed:
Apr. 26, 2001
Applicant:
Inventor:
John M. Altendorf, Corvallis, OR (US);
Assignee:
Hewlett-Packard Development Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/19 ;
U.S. Cl.
CPC ...
B41J 2/19 ;
Abstract
An evacuated structure removes air accumulated within a container that contains material held at a first pressure. The evacuated structure has a shell that includes a slowly defusing air-permeable material. The air permeable material interfaces to a volume of space evacuated to a second pressure less than the first pressure within the container. Unwanted air that accumulates within the container is drawn into the volume of space of the evacuated structure due to the difference in pressure between the interior of the container and the interior of the shell.