1
Walter J Schrenk, John A Wheatley, Victor S Chang: Birefringent interference polarizer. The Dow Chemical Company, January 23, 1996: US05486949 (236 worldwide citation)

A birefringent interference polarizer which may be fabricated from readily available materials using established coextrusion techniques is provided. The polarizer has a level of light absorption near zero and can be fabricated to polarize and reflect light of specific wavelengths while transmitting ...


2
Walter J Schrenk, Charles B Arends, Conrad F Balazs, Ray A Lewis, John A Wheatley: Formable reflective multilayer body. The Dow Chemical Company, October 22, 1996: US05568316 (225 worldwide citation)

A formable multilayer reflective polymeric body which has a substantially uniform broad bandwidth reflectance over substantially the entire range of the visible spectrum to provide a substantially uniform reflective appearance is provided. The body includes at least first and second diverse polymeri ...


3
Walter J Schrenk: Lamellar polymeric body. The Dow Chemical Company, June 8, 1993: US05217794 (225 worldwide citation)

A lamellar polymeric body which may be reflective and which contains no metals and method of making it are provided. The body can be fabricated and/or post-formed into a variety of parts without alteration of its appearance. The body includes discontinuous layers of at least one polymeric material w ...


4
Ravi Ramanathan, Walter J Schrenk, John A Wheatley: Coextrusion of multilayer articles using protective boundary layers and apparatus therefor. The Dow Chemical Company, December 14, 1993: US05269995 (201 worldwide citation)

A process and apparatus for the coextrusion of a multilayer polymeric body is provided which incorporates protective boundary layers into the body, protecting the layers from instability and breakup during layer formation and multiplication. The process includes the steps of providing at least first ...


5
Ray A Lewis, David M Wisniewski, Ravi Ramanathan, Walter J Schrenk: Layer thickness gradient control in multilayer polymeric bodies. The Dow Chemical Company, February 14, 1995: US05389324 (196 worldwide citation)

Methods and apparatus for generating, and then precisely controlling, layer thickness gradients in multilayered polymeric reflective bodies are provided. The creation of such gradients is useful in tailoring multilayer bodies to reflect and/or transmit desired wavelengths of light. Both thermal and ...


6
Charles B Arends, Walter J Schrenk, Ray A Lewis, Ravi Ramanathan, John Wheatley: Two component infrared reflecting film. The Dow Chemical Company, November 1, 1994: US05360659 (196 worldwide citation)

The present invention provides a two-component infrared reflecting film which reflects light in the infrared region of the spectrum while suppressing second, third and fourth order reflections in the visible spectrum. The film comprises alternating layers of first (A) and second (B) diverse polymeri ...


7
John A Wheatley, Walter J Schrenk: Relective polymeric body. The Dow Chemical Company, June 16, 1992: US05122905 (178 worldwide citation)

A multilayered reflective body which is thermoformable and capable of being fabricated into relatively thick parts while maintaining a uniform reflective appearance is provided. The reflective polymeric body includes at least first and second diverse polymeric materials of a sufficient number of alt ...


8
Walter J Schrenk, John A Wheatley: Infrared reflective optical interference film. The Dow Chemical Company, April 7, 1992: US05103337 (171 worldwide citation)

The present invention provides an optical interference film, made of multiple layers of polymers, which reflects wavelengths of light in the infrared region of the spectrum while being substantially transparent to wavelengths of light in the visible spectrum. The optical interference film includes m ...


9
Walter J Schrenk, Victor S Chang, John A Wheatley: Birefringent interference polarizer. The Dow Chemical Company, March 18, 1997: US05612820 (170 worldwide citation)

A birefringent interference polarizer which may be fabricated from readily available materials using established coextrusion techniques is provided. The polarizer has a level of light absorption near zero and can be fabricated to polarize and reflect light of specific wavelengths while transmitting ...


10
Walter J Schrenk, Charles B Arends, Conrad F Balazs, Ray A Lewis, John A Wheatley: Formable reflective multilayer body. The Dow Chemical Company, September 5, 1995: US05448404 (156 worldwide citation)

A formable multilayer reflective polymeric body which has a substantially uniform broad bandwidth reflectance over substantially the entire range of the visible spectrum to provide a substantially uniform reflective appearance is provided. The body includes at least first and second diverse polymeri ...