04450665 is referenced by 46 patents and cites 8 patents.

Elongated siding panels formed from plastic have integral joint portions along their side edges which are adapted to fit together and interlock when the panels are mounted on a building wall in overlapping relation. A flange adjacent the top edge of the panels extends outwardly and downwardly to define a channel open at its bottom, and an upwardly directed lip on the bottom edge of the panels is adapted to project into and interlock with the channel on a panel mounted therebelow on a building wall. A plurality of inwardly directed protrusions, or dimples, are formed on the upwardly directed lip to provide an interference fit with entrance to the channel.

Title
Interlocking building siding
Application Number
6/282140
Publication Number
4450665
Application Date
July 10, 1981
Publication Date
May 29, 1984
Inventor
Harry Katz
Westerville
OH, US
Agent
Vorys Sater Seymour & Pease
Assignee
Vinyl Improvement Products Company
OH, US
IPC
E04D
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