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.:

US 7481593 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 27, 2009

Filed:

Jul. 14, 2004
Applicants:

Wing Sum Vincent Kwan, Chicago, IL (US);

Leighton Davies-smith, Oswego, IL (US);

Inventors:

Wing Sum Vincent Kwan, Chicago, IL (US);

Leighton Davies-Smith, Oswego, IL (US);

Assignee:

Sanford, L.P., Oak Brook, IL (US);

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A46B 11/04 (2006.01); A47L 13/22 (2006.01);
U.S. Cl.
CPC ...
Abstract

A fluid control system for writing instruments, correction fluid dispensers and self contained paint brush and paint reservoirs is disclosed. The fluid control system includes two filters or reservoirs, including a hydrophobic filter/reservoir and a hydrophilic filter/reservoir. The hydrophobic and hydrophilic elements may be spaced adjacent to and in abutting engagement with each other or a gap or space may be disposed therebetween. The hydrophobic element is disposed adjacent to the fluid reservoir (i.e., ink, correction fluid, paint reservoir or other water based fluid) and the hydrophilic element is disposed adjacent to the applicator tip or brush.


Find Patent Forward Citations

Kwan, Wing Sum Vincent. (2009). Combination hydrophobic/hydrophilic filters/reservoirs for controlling fluid flow (U.S. Patent No. 7481593). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7481593

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Loading…