Inventor
SCHRENK WALTER J
US37 patents
⚠️ This page may combine multiple inventors who share the name “SCHRENK WALTER J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DOW CHEMICAL CO
34 patentsUS5316703AMay 31, 1994
Method of producing a lamellar polymeric body
DOW CHEMICAL CO326 citations99
USRE34605EMay 10, 1994
Infrared reflective optical interference film
DOW CHEMICAL CO217 citations99
US5269995ADec 14, 1993
Coextrusion of multilayer articles using protective boundary layers and apparatus therefor
DOW CHEMICAL CO414 citations99
US5233465AAug 3, 1993
Visibly transparent infrared reflecting film with color masking
DOW CHEMICAL CO183 citations99
US5217794AJun 8, 1993
Lamellar polymeric body
DOW CHEMICAL CO375 citations99
US5126880AJun 30, 1992
Polymeric reflective bodies with multiple layer types
DOW CHEMICAL CO228 citations99
US5122905AJun 16, 1992
Relective polymeric body
DOW CHEMICAL CO381 citations99
US5103337AApr 7, 1992
Infrared reflective optical interference film
DOW CHEMICAL CO445 citations99
US5095210AMar 10, 1992
Multilayer film indicator for determining the integrity or authenticity of an item and process for using same
DOW CHEMICAL CO197 citations99
US5612820AMar 18, 1997
Birefringent interference polarizer
DOW CHEMICAL CO414 citations98
US5568316AOct 22, 1996
Formable reflective multilayer body
DOW CHEMICAL CO356 citations98
US5486949AJan 23, 1996
Birefringent interference polarizer
DOW CHEMICAL CO544 citations98
US5448404ASep 5, 1995
Formable reflective multilayer body
DOW CHEMICAL CO404 citations98
US5389324AFeb 14, 1995
Layer thickness gradient control in multilayer polymeric bodies
DOW CHEMICAL CO426 citations98
US5360659ANov 1, 1994
Two component infrared reflecting film
DOW CHEMICAL CO489 citations98
US5278694AJan 11, 1994
Optically dissimilar composition for polymeric reflective bodies
DOW CHEMICAL CO184 citations98
US5262894ANov 16, 1993
Multicomponent, multilayer polymeric reflective bodies
DOW CHEMICAL CO130 citations98
US5149578ASep 22, 1992
Multilayer film for tamper indication by use of optical interference reflection
DOW CHEMICAL CO122 citations98
US4937134AJun 26, 1990
Elastomeric optical interference films
DOW CHEMICAL CO251 citations98
US5628950AMay 13, 1997
Method and apparatus for producing multilayer plastic articles
DOW CHEMICAL CO124 citations97
US5202074AApr 13, 1993
Method for producing injection molded multilayer articles
DOW CHEMICAL CO149 citations97
US5094793AMar 10, 1992
Methods and apparatus for generating interfacial surfaces
DOW CHEMICAL CO313 citations97
US5234729AAug 10, 1993
Multilayer polymeric reflective bodies for decorative and security applications
DOW CHEMICAL CO107 citations96
US5094788AMar 10, 1992
Interfacial surface generator
DOW CHEMICAL CO352 citations95
US3995763ADec 7, 1976
Biaxially oriented thermoplastic container with or without molded tip periphery
DOW CHEMICAL CO65 citations95
US3947204AMar 30, 1976
Scrapless forming of plastic articles
DOW CHEMICAL CO52 citations95
US5380479AJan 10, 1995
Method and apparatus for producing multilayer plastic articles
DOW CHEMICAL CO58 citations94
US4806289AFeb 21, 1989
Method of making a hollow light pipe
DOW CHEMICAL CO95 citations93
US3977153AAug 31, 1976
Container for food products and method for making same
DOW CHEMICAL CO46 citations93
US4005967AFeb 1, 1977
Scrapless forming of plastic articles
DOW CHEMICAL CO36 citations92
US5540878AJul 30, 1996
Method for producing blow molded multilayer plastic articles
DOW CHEMICAL CO33 citations91
US4094947AJun 13, 1978
Multilayer coextrusion process for producing selective reflectivity
DOW CHEMICAL CO89 citations91
US4871487AOct 3, 1989
Method of making a polymeric optical waveguide by coextrusion
DOW CHEMICAL CO23 citations79
US4122138AOct 24, 1978
Method of preparing blown thermoplastic articles having multiaxial orientation
DOW CHEMICAL CO9 citations68