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. 15, 2011
Filed:
Oct. 31, 2007
David A. Farber, Ojai, CA (US);
Richard E. Greer, Red Lodge, MT (US);
Andrew D. Swart, Pennington, NJ (US);
James A. Balter, Santa Barbara, CA (US);
David A. Farber, Ojai, CA (US);
Richard E. Greer, Red Lodge, MT (US);
Andrew D. Swart, Pennington, NJ (US);
James A. Balter, Santa Barbara, CA (US);
Level 3 Communications, LLC, Broomfield, CO (US);
Abstract
A repeater server in a content delivery network (CDN) maintains a list of resources that are no longer valid. When the server gets a request for a resource, it checks whether that resource is on the list, and, if so, it replicates the resource from a content provider's content source such as an origin server. Otherwise the repeater server tries to serve a copy of the requested resource or to obtain a copy from another location in the CDN.