US Patent No: 6,274,221

Number of patents in Portfolio can not be more than 2000

Angular brightness microprismatic retroreflective film or sheeting incorporating a syndiotactic vinyl aromatic polymer

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Abstract

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A novel microprismatic retroreflective film or sheeting is provided which comprises a transparent semicrystalline polymer. The microprismatic retroreflective film or sheeting of the present invention offers superior retroreflective brightness at large angles of incidence and at large observational angles. Syndiotactic vinyl aromatic polymers, especially syndiotactic polystyrene and copolymers thereof, are preferred semicrystalline polymers, as they impart good dimensional stability and resistance to moisture, and can be made resistant to UV radiation. Signing materials comprising these microprismatic retroreflective films provide improved performance for off-angle illumination and viewing in traffic control and other signing applications.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
3M INNOVATIVE PROPERTIES COMPANYST PAUL, MN7908

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ojeda, Jaime R Woodbury, MN 6 152
Smith, Kenneth L White Bear Lake, MN 135 2494
Tabar, Ronald J St. Paul, MN 16 353

Cited Art Landscape

Patent Info (Count) # Cites Year
 
KURARAY CO., LTD. (1)
5,346,950 Resin composition 42 1993
 
THE DOW CHEMICAL COMPANY (3)
5,145,950 Method of storing food or plant materials by wrapping with a stretched syndiotactic polystyrene film 51 1991
5,318,839 Laminate with a styrenic polymer layer 20 1992
5,476,899 Process for produce a readily slidable film 17 1993
 
MINNESOTA MINING AND MANUFACTURING COMPANY (6)
4,588,258 Cube-corner retroreflective articles having wide angularity in multiple viewing planes 273 1984
4,775,219 Cube-corner retroreflective articles having tailored divergence profiles 215 1986
4,895,428 High efficiency retroreflective material 151 1988
5,138,488 Retroreflective material with improved angularity 140 1990
* 5,754,338 Structured retroreflective sheeting having a rivet-like connection 41 1996
* 5,932,626 Optical product prepared from high index of refraction brominated monomers 58 1997
 
3M INNOVATIVE PROPERTIES COMPANY (4)
5,706,132 Dual orientation retroreflective sheeting 84 1996
* 5,783,120 Method for making an optical film 254 1996
* 5,808,794 Reflective polarizers having extended red band edge for controlled off axis color 171 1996
* 6,024,455 Reflective article with concealed retroreflective pattern 73 1998
 
NIPPON CARBIDE KOGYO KABUSHIKI KAISHA (1)
* 6,010,609 Method of making a microprism master mold 43 1998
 
LUCENT TECHNOLOGIES INC. (1)
* 5,990,256 Long chain branched syndiotactic vinyl aromatic polymers 3 1998
 
IDEMITSU KOSAN CO., LTD. (3)
5,127,158 Process for producing a printed circuit board with a syndiotactic polystyrene support 33 1990
5,219,940 Styrene polymer composition 44 1991
5,496,919 Process for production of styrene-based polymer moldings 5 1993
 
Idemitsu Petrochemical Co., Ltd. (2)
5,082,717 Styrene-based resin composite material 14 1989
5,273,830 Magnetic recording medium comprising a syndiotactic styrene-based polymer substrate, a magnetic layer and a backcoat lubricating layer each layer containing a curable phosphazine compound 28 1991
 
ROHM AND HAAS COMPANY (1)
* 5,654,365 Styrenic polymer composition 7 1996
 
Relfexite Corporation (1)
4,332,847 Method for compression molding of retroreflective sheeting and sheeting produced thereby 68 1980
 
AVERY DENNISON CORPORATION (2)
4,486,363 Method and apparatus for embossing a precision optical pattern in a resinous sheet 124 1982
4,601,861 Methods and apparatus for embossing a precision optical pattern in a resinous sheet or laminate 188 1984
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MAGNA MIRRORS OF AMERICA, INC. (4)
8,154,418 Interior rearview mirror system 34 2009
8,508,383 Interior rearview mirror system 4 2012
8,654,433 Rearview mirror assembly for vehicle 2 2013
9,221,399 Automotive communication system 0 2014
 
MUSE GREEN INVESTMENTS LLC (1)
* 2007/0064,098 Systems and methods for 3D rendering 12 2005
 
3M INNOVATIVE PROPERTIES COMPANY (5)
7,195,360 Prismatic retroreflective article and method 7 2004
7,347,571 Prismatic retroreflective article with fluorine- or silicon-containing prisms 5 2005
* 2006/0158,736 Prismatic retroreflective article with fluorine- or silicon-containing prisms 1 2005
7,547,105 Prismatic retroreflective article with cross-linked image layer and method of making same 6 2007
* 2009/0021,831 PRISMATIC RETROREFLECTIVE ARTICLE WITH CROSS-LINKED IMAGE LAYER AND METHOD OF MAKING SAME 4 2007
 
MAGNA ELECTRONICS INC. (13)
9,019,090 Vision system for vehicle 0 2009
7,888,629 Vehicular accessory mounting system with a forwardly-viewing camera 66 2009
7,914,188 Interior rearview mirror system for a vehicle 70 2009
8,309,907 Accessory system suitable for use in a vehicle and accommodating a rain sensor 28 2010
7,994,471 Interior rearview mirror system with forwardly-viewing camera 59 2011
8,094,002 Interior rearview mirror system 52 2011
8,100,568 Interior rearview mirror system for a vehicle 53 2011
8,134,117 Vehicular having a camera, a rain sensor and a single-ball interior electrochromic mirror assembly attached at an attachment element 43 2011
8,427,288 Rear vision system for a vehicle 12 2011
8,267,559 Interior rearview mirror assembly for a vehicle 8 2012
8,288,711 Interior rearview mirror system with forwardly-viewing camera and a control 30 2012
8,543,330 Driver assist system for vehicle 27 2012
9,014,966 Driver assist system for vehicle 0 2014
 
MAGNA ELECTRONICS IN. (1)
8,676,491 Driver assist system for vehicle 8 2013
 
DONNELLY CORPORATION (72)
7,855,755 Interior rearview mirror assembly with display 111 2006
8,095,310 Video mirror system for a vehicle 58 2008
8,194,133 Vehicular video mirror system 36 2008
7,871,169 Vehicular signal mirror 52 2008
7,826,123 Vehicular interior electrochromic rearview mirror assembly 54 2009
8,462,204 Vehicular vision system 3 2009
8,044,776 Rear vision system for vehicle 51 2009
8,083,386 Interior rearview mirror assembly with display device 33 2009
7,859,737 Interior rearview mirror system for a vehicle 45 2009
7,898,719 Rearview mirror assembly for vehicle 43 2009
8,072,318 Video mirror system for vehicle 54 2009
7,821,697 Exterior reflective mirror element for a vehicular rearview mirror assembly 55 2009
7,926,960 Interior rearview mirror system for vehicle 45 2009
8,294,975 Automotive rearview mirror assembly 20 2010
8,842,176 Automatic vehicle exterior light control 1 2010
7,898,398 Interior mirror system 46 2010
7,832,882 Information mirror system 41 2010
7,822,543 Video display system for vehicle 41 2010
7,864,399 Reflective mirror assembly 65 2010
8,179,236 Video mirror system suitable for use in a vehicle 40 2010
7,916,009 Accessory mounting system suitable for use in a vehicle 58 2010
7,906,756 Vehicle rearview mirror system 44 2010
7,815,326 Interior rearview mirror system 49 2010
8,277,059 Vehicular electrochromic interior rearview mirror assembly 10 2010
8,282,226 Interior rearview mirror system 7 2010
8,000,894 Vehicular wireless communication system 37 2010
8,164,817 Method of forming a mirrored bent cut glass shape for vehicular exterior rearview mirror assembly 26 2010
7,918,570 Vehicular interior rearview information mirror system 38 2010
8,228,588 Interior rearview mirror information display system for a vehicle 20 2010
8,335,032 Reflective mirror assembly 13 2010
8,511,841 Vehicular blind spot indicator mirror 3 2011
8,019,505 Vehicle information display 38 2011
8,179,586 Rearview mirror assembly for vehicle 26 2011
8,063,753 Interior rearview mirror system 41 2011
8,049,640 Mirror assembly for vehicle 48 2011
8,106,347 Vehicle rearview mirror system 36 2011
9,019,091 Interior rearview mirror system 0 2011
8,525,703 Interior rearview mirror system 2 2011
8,047,667 Vehicular interior rearview mirror system 41 2011
8,162,493 Interior rearview mirror assembly for vehicle 25 2011
8,121,787 Vehicular video mirror system 23 2011
8,095,260 Vehicle information display 34 2011
8,325,055 Mirror assembly for vehicle 0 2011
8,177,376 Vehicular interior rearview mirror system 22 2011
8,779,910 Interior rearview mirror system 2 2011
8,653,959 Video mirror system for a vehicle 2 2011
8,282,253 Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle 9 2011
8,325,028 Interior rearview mirror system 40 2012
8,170,748 Vehicle information display system 11 2012
8,304,711 Vehicle rearview mirror system 22 2012
8,271,187 Vehicular video mirror system 9 2012
8,559,093 Electrochromic mirror reflective element for vehicular rearview mirror assembly 3 2012
8,355,839 Vehicle vision system with night vision function 2 2012
8,465,162 Vehicular interior rearview mirror system 2 2012
8,379,289 Rearview mirror assembly for vehicle 7 2012
8,908,039 Vehicular video mirror system 0 2012
8,400,704 Interior rearview mirror system for a vehicle 6 2012
8,503,062 Rearview mirror element assembly for vehicle 1 2012
8,506,096 Variable reflectance mirror reflective element for exterior mirror assembly 6 2012
8,833,987 Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle 1 2012
8,465,163 Interior rearview mirror system 3 2012
8,610,992 Variable transmission window 0 2012
8,508,384 Rearview mirror assembly for vehicle 2 2012
8,797,627 Exterior rearview mirror assembly 4 2012
8,577,549 Information display system for a vehicle 2 2013
8,705,161 Method of manufacturing a reflective element for a vehicular rearview mirror assembly 0 2013
8,608,327 Automatic compass system for vehicle 1 2013
8,727,547 Variable reflectance mirror reflective element for exterior mirror assembly 1 2013
8,884,788 Automotive communication system 1 2013
9,090,211 Variable reflectance mirror reflective element for exterior mirror assembly 0 2014
9,073,491 Exterior rearview mirror assembly 0 2014
9,045,091 Mirror reflective element sub-assembly for exterior rearview mirror of a vehicle 0 2014
* Cited By Examiner