06157930 is referenced by 41 patents and cites 8 patents.

WAN documents are stored locally in cache with a document expiration date. Ideally, content is unchanged prior to the expiration date and has changed after the expiration date. When requesting to view a WAN document while on-line, the document first is displayed from cache for display and verify mode. The web browser then sends a request to the web server to verify whether the document has been modified. If still valid, then the document is already displayed and time has been saved. If invalid, then the document is downloaded from the web server, stored in cache, and optionally or automatically displayed in place of the invalid document. A signal is communicated to the user, for example, to give the option to reload the document. Because document expiration times may be absent or unreliable, a soft and a hard expiration time are derived and adjusted dynamically based upon their reliability.

Title
Accelerating access to wide area network information in mode for showing document then verifying validity
Application Number
9/160446
Publication Number
6157930
Application Date
September 24, 1998
Publication Date
December 5, 2000
Inventor
Timothy W Smith
Seattle
WA, US
Clinton L Ballard
Suquamish
WA, US
Agent
Steven P Koda Esq
Assignee
Acceleration Software International Corporation
WA, US
IPC
G06F 17/00
G06F 17/30
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