US Patent No: 5,149,578

Number of patents in Portfolio can not be more than 2000

Multilayer film for tamper indication by use of optical interference reflection

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A multilayer film including contiguous layers of two or more diverse thermoplastic materials of differing refractive indices whereby the film retains a permanent color change as evidence of tampering or an attempt at tampering when the yield point of at least one of the diverse materials has been at least equalled by the strain associated with such tampering or with such an attempt at tampering, and where before such yield point is at least equalled the wavelength of an unsuppressed reflectance of normally incident light is not within the visible spectrum while after such yielded point is at least equalled the reflectance is retained in the visible spectrum.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
3M INNOVATIVE PROPERTIES COMPANYST PAUL, MN7902

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Schrenk, Walter J Midland, MI 32 3613
Wheatley, John A Lake Elmo, MN 129 3533

Cited Art

Patent Info (Count) # Cites Year
 
3M INNOVATIVE PROPERTIES COMPANY (1)
4,937,134 Elastomeric optical interference films 134 1989
 
ALCAN INTERNATIONAL LIMITED (1)
4,837,061 Tamper-evident structures 48 1987
 
CANON KABUSHIKI KAISHA (1)
2003/0137,680 IMAGE PROCESSING APPARATUS, METHOD OF CONTROLLING SAME, AND IMAGE PROCESSING SYSTEM 1998
 
FIS ORGANISATION AG (1)
4,469,725 Identification card 20 1982
 
JDS UNIPHASE CORPORATION (1)
4,721,217 Tamper evident optically variable device and article utilizing the same 75 1986
 
LEONHARD KURZ GMBH & CO. (1)
4,717,615 Multi-layer foil and process for the production thereof 25 1986
 
MEARL CORPORATION, A CORPORATION OF NEW JERSEY (1)
4,310,584 Multilayer light-reflecting film 147 1979
 
OPSEC SECURITY GROUP, INC. (1)
4,890,763 Tamper resistant package and method of making same 22 1988
 
RCA CORPORATION (1)
4,417,784 Multiple image encoding using surface relief structures as authenticating device for sheet-material authenticated item 59 1981
 
ROHM GMBH CHEMISCHE FABRIK (1)
4,876,311 Opaque synthetic resins 15 1988
 
TRANS WORLD TRADE, INC., A UTAH CORP. (1)
4,516,679 Tamper-proof wrap 38 1982
 
UNIPAC CORPORATION (1)
4,733,786 Container and innerseal capable of indicating heat tampering 19 1986
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
4,986,063 Method and apparatus for compacting grass, leafage or similar material 6 1989

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
3M INNOVATIVE PROPERTIES COMPANY (64)
5,262,894 Multicomponent, multilayer polymeric reflective bodies 80 1992
5,448,404 Formable reflective multilayer body 185 1994
5,882,774 Optical film 415 1995
5,828,488 Reflective polarizer display 174 1995
5,568,316 Formable reflective multilayer body 148 1995
5,684,633 Polymeric reflective materials utilizing a back light source 19 1995
6,101,032 Light fixture having a multilayer polymeric film 85 1995
6,088,067 Liquid crystal display projection system using multilayer optical film polarizers 37 1995
6,080,467 High efficiency optical devices 78 1995
5,686,979 Optical panel capable of switching between reflective and transmissive states 319 1995
5,825,543 Diffusely reflecting polarizing element including a first birefringent phase and a second phase 259 1996
5,968,666 Multilayer polyester film 10 1996
5,808,798 Nonpolarizing beamsplitter 28 1996
6,565,982 Transparent multilayer device 16 1996
5,808,794 Reflective polarizers having extended red band edge for controlled off axis color 166 1996
6,025,897 Display with reflective polarizer and randomizing cavity 93 1996
6,590,705 Optical film with co-continuous phases 29 1997
6,111,696 Brightness enhancement film 196 1997
6,057,961 Optical film with increased gain at non-normal angles of incidence 42 1997
6,288,172 Light diffusing adhesive 36 1997
5,831,375 Electroluminescent lamp using multilayer optical film 50 1997
6,368,699 Multilayer polymer film with additional coatings or layers 94 1997
5,825,542 Diffusely reflecting multilayer polarizers and mirrors 182 1997
6,124,971 Transflective displays with reflective polarizing transflector 90 1997
5,965,247 Process for forming reflective polarizer 172 1997
5,962,114 Polarizing beam-splitting optical component 127 1997
6,088,163 Metal-coated multilayer mirror 39 1997
6,045,894 Clear to colored security film 59 1998
6,018,419 Diffuse reflectors 26 1998
5,991,077 Multilayer polarizer having a continuous and disperse phase 42 1998
6,031,665 Method of forming a multilayer film having a continuous and disperse phase 25 1998
6,088,159 Reflective polarizers having extended red band edge for controlled off axis color 20 1998
6,096,375 Optical polarizer 64 1999
6,005,713 Multilayer polarizer having a continuous and disperse phase 13 1999
6,185,039 Infrared selective reflective polarizing element 12 1999
6,459,514 Multilayer polymer film with additional coatings or layers 30 1999
6,451,414 Multilayer infrared reflecting optical body 23 1999
6,543,153 Reflective polarizer having improved properties and optical display with improved reflective polarizer 17 1999
6,210,785 High efficiency optical devices 14 1999
6,141,149 Multilayer film having a continuous and disperse phase 24 2000
6,262,842 Transflective displays with reflective polarizing transflector 81 2000
6,449,092 Reflective polarizers having extended red band edge for reduced off axis color 9 2000
6,797,396 Wrinkle resistant infrared reflecting film and non-planar laminate articles made therefrom 80 2000
6,396,631 Light fixture having a multilayer polymeric film 13 2000
6,760,157 Brightness enhancement film 83 2000
6,804,058 Electroluminescent light source and display incorporating same 12 2000
6,641,883 High efficiency optical devices 3 2001
6,888,675 Transflective displays with reflective polarizing transflector 3 2001
6,737,154 Multilayer polymer film with additional coatings or layers 12 2001
6,613,421 Optical film 15 2001
6,905,220 Backlight system with multilayer optical film reflector 33 2002
6,788,463 Post-formable multilayer optical films and methods of forming 20 2002
6,685,341 Light fixture having a multilayer polymeric film 14 2002
7,038,745 Brightness enhancing reflective polarizer 13 2003
6,987,612 Optical film with co-continuous phases 3 2003
7,083,847 Optical film 3 2003
7,321,464 Electroluminescent light source and display incorporating same 6 2004
6,999,233 Optical film with co-continuous phases 1 2004
7,147,903 High efficiency optical devices 3 2005
7,423,708 Display having a reflective polarizer 1 2005
7,057,816 Optical film with co-continuous phases 1 2006
7,297,393 Optical film 1 2006
7,833,593 High efficiency optical devices 0 2007
7,852,560 Display incorporating reflective polarizer 0 2008
 
MINNESOTA MINING AND MANUFACTURING COMPANY (7)
5,643,668 Tape for rough surfaces 23 1994
5,867,316 Multilayer film having a continuous and disperse phase 105 1996
5,795,528 Method for making a multilayer polyester film having a low coefficient of friction 9 1996
5,783,283 Multilayer polyester film with a low coefficient of friction 15 1996
5,759,467 Method for making multilayer polyester film 28 1996
6,297,906 Light fixture containing optical film 33 1997
5,976,424 Method for making multilayer optical films having thin optical layers 49 1997
 
TRANSHIELD TECHNOLOGY AS (4)
5,623,812 Shrink wrap material and method for protecting articles 10 1995
6,562,740 Material for protecting articles having a nonwoven fabric bonded to a shrink film by an adhesive applied to the film in a pre-determined pattern 5 2000
6,696,120 Shrink wrap material having reinforcing scrim and method for its manufacture 2 2000
6,875,712 Material for protecting articles having a nonwoven fabric bonded to a shrink film by an adhesive applied in a pre-determined pattern 0 2002
 
THE UNIVERSITY OF BRITISH COLUMBIA (2)
5,661,839 Light guide employing multilayer optical film 86 1996
RE37594 Light guide employing multilayer optical film 27 1999
 
TORAY INDUSTRIES, INC. (2)
8,110,282 Laminated film and molded body 1 2006
8,404,335 Laminated film and molded body 0 2012
 
BURROUGHS WELLCOME CO. (1)
5,495,944 Bottle with tamper evident wrapping 32 1994
 
COMMISSARIAT A L'ENERGIE ATOMIQUE (1)
5,623,375 International dielectric mirror and production process for such a mirror 11 1994
 
DAI NIPPON PRINTING CO., LTD. (1)
6,852,397 Counterfeit-proof volume hologram multilayer structure, and counterfeit-proof volume hologram seal 4 2002
 
ENGELHARD CORPORATION (1)
5,451,449 Colored iridescent film 74 1994
 
HONEYWELL INC. (1)
6,310,671 Polarization sensitive scattering element 25 1998
 
NOVOZYMES BIOTECH, INC. (1)
6,924,014 High efficiency optical devices 9 2003
 
PETER VOGEL;GE HEALTHCARE (1)
5,946,431 Multi-functional photometer with movable linkage for routing light-transmitting paths using reflective surfaces 2 1997
 
PWP INDUSTRIES (1)
7,913,870 Tamper evident container 0 2006
 
RMS PACKAGING (1)
6,602,585 Shrinkable iridescent film 3 2001
 
THE DOW CHEMICAL COMPANY (1)
5,552,927 All-polymeric cold mirror 82 1994
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
5,633,058 Message-indicating self-wound tape and method of making same 18 1995
8,441,710 Tunable thin-film filter 0 2010