Material for packaging light-sensitive materials
Patent 4513050 Issued on April 23, 1985. Estimated Expiration Date: 
April 22, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 22, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPackaging material for photosensitive materials Laminated packaging material Sheet material and envelope for packaging electronic parts Retortable foil-based packaging structure Patent #: 4424256 InventorAssigneeApplicationNo. 06/487567 filed on 04/22/1983US Classes:428/200, With heat sealable or heat releasable adhesive layer206/455, Photo film or plate206/497, SHRINK FILM PACKAGE (E.G., BY HEAT OR VACUUM)264/1.31, Light polarizing article or holographic article264/171.17, Shaping of plural layers on preform264/173.19, Polyamide (e.g., nylon, etc.) or addition polymer of at least one monoethylenically unsaturated monomer (e.g., polyethylene, polypropylene, polystyrene, etc.) containing layer426/126, Three or more layered diverse packaging materials having at least one metal layer426/127, Three or more layered packaging materials428/201, Intermediate layer is discontinuous or differential428/206, Including particulate material428/207, Including coloring matter428/215, Absolute thicknesses specified428/347, Heat sealable428/408, SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER LAYER428/458, Next to polyester, polyamide or polyimide (e.g., alkyd, glue, or nylon, etc.)428/463, Ester, halide or nitrile of addition polymer428/483, Next to addition polymer from unsaturated monomers428/516, Monoolefin polymer428/520, Ester, halide or nitrile of addition polymer428/910, PRODUCT WITH MOLECULAR ORIENTATION428/913MATERIAL DESIGNED TO BE RESPONSIVE TO TEMPERATURE, LIGHT, MOISTURE, ETC.ExaminersPrimary: Ives, Patricia C.Attorney, Agent or FirmInternational ClassesB32B 27/32 (20060101)G03C 3/00 (20060101) Foreign Application Priority Data1982-04-26 JPAbstractA material for packaging light-sensitive materials composed of a composite sheet comprising a substrate coated with a middle layer(s) and a surface layer(s) is manufactured through melt co-extrusion, said surface layer(s) being of thermoplastic resins which have excellent heat seal properties yet have great neck-in, said middle layer(s) being of thermoplastic resins having small neck-in and excellent adhesion to a substrate, and any of layers of said composite sheet containing light-shielding material.Field of SearchHeat sealableIncluding a second component containing structurally defined particles Ester, halide or nitrile of addition polymer Heavy metal or aluminum or compound thereof Next to polyester, polyamide or polyimide (e.g., alkyd, glue, or nylon, etc.) SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER LAYER Monoolefin polymer Ester, halide or nitrile of addition polymer Absolute thicknesses specified With heat sealable or heat releasable adhesive layer Intermediate layer is discontinuous or differential Including particulate material Including coloring matter Next to addition polymer from unsaturated monomers | |
