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. 07, 2009
Filed:
Feb. 13, 2004
Umesh Madan, Bellevue, WA (US);
Geary L. Eppley, Carnation, WA (US);
David Wortendyke, Seattle, WA (US);
Umesh Madan, Bellevue, WA (US);
Geary L. Eppley, Carnation, WA (US);
David Wortendyke, Seattle, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
An inverse query engine system having a cache integrated therein and methods for maintaining the cache are described herein. Entities storing filters in the inverse query engine cache thus do not have to maintain an individual cache to maintain the filters. The inverse query engine system cache is maintained within a bounded size by removing expired filters from the cache and trimming the cache to an optimal size when the cache reaches a maximum size. In the event that filter size cannot be determined efficiently, weights may be associated with filters stored in the cache, each weight identifying an estimate of a filter size. The weights are used to determine cache size and to maintain the cache size within particular bounds.