US 7,138,173 B2Granted

Red-green-blue polymeric interference film

Assignee3MInnovative Properties Company

InventorsJohn A. Wheatley, Andrew J. Ouderkirk, Timothy J. Nevitt, Michael F. Weber

Life of this patent

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Abstract

Multilayer polymeric films and other optical bodies are provided which is useful in making colored mirrors and polarizers. The films are characterized by a change in color as a function of viewing angle.

Claims18

Dependent claims

An article, comprising:

a film comprising alternating polymeric layers configured to selectively reflect and
transmit visible light at a design angle of incidence, the selective reflection comprising a
red reflection band, a green reflection band, and a blue reflection band.

Dependencies are inferred from the claim text.

Facts

Application: 10/952,335Filed 27 Sep 2004 · continuation
Priority: 13 Jan 1998
Published: US 2005/0079333 A114 Apr 2005
Granted: 21 Nov 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification33 codes

B32B 7/023
Physical, chemical or physicochemical properties: optical properties
B29C 48/08
Flat, e.g. panels: flexible, e.g. films
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin

Family

Application09/006,591Parent of this continuation · filed 13 Jan 1998
Application10/188,175Parent of this continuation · filed 1 Jul 2002
US 2005/0079333 A1Pre-grant publication · published 14 Apr 2005
US 6,797,366 B2Parent of this continuation
US 6,531,230 B1Parent of this continuation
US 2003/0035972 A1Published application
US 7,138,173 B2This patent

From the US filing history. Foreign family members aren’t listed.

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