Packaging material for photosensitive materials
Patent 5234750 Issued on August 10, 1993. Estimated Expiration Date: 
March 24, 2012. 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.
March 24, 2012. 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 ReferencesThermoplastic olefin resin composition and laminated film or sheet thereof Polymers photostabilized by novel imidazole-2-carboxanilides Patent #: 4820757 InventorApplicationNo. 856480 filed on 03/24/1992US Classes:428/219, Weight per unit area specified264/176.1, Shaping by extrusion426/127, Three or more layered packaging materials428/34.3, Bag or tubular film (e.g., pouch, flexible food casing, envelope, etc.)428/408, SELF-SUSTAINING CARBON MASS OR LAYER WITH IMPREGNANT OR OTHER LAYER428/412, Of polycarbonate428/474.4, Of polyamide428/475.2, Next to polyester428/483, Next to addition polymer from unsaturated monomers428/512, Addition polymer of hydrocarbon(s) only428/514, Ester, halide or nitrile of addition polymer428/516, Monoolefin polymer428/518, Next to vinyl or vinylidene chloride polymer428/910, PRODUCT WITH MOLECULAR ORIENTATION430/501Roll filmExaminersPrimary: Sluby, P. C.Attorney, Agent or FirmInternational ClassesB32B 027/36B32B 023/08 B65D 081/30 Foreign Application Priority Data1989-04-20 JPAbstractA resin composition containing a light-shielding material and vitamin E and packaging materials formed thereof. The light-shielding ability is increased by blending vitamin E. Laminated films where at least one thermoplastic resin film is interposed between two high Young's modulus films. The laminated films are excellent in tear strength, tensile strength, heat seal strength and bursting strength, and always secure light-shielding, moistureproofness and gas barrier. They can be used as a single-sheet bag for packaging a heavy product having shap edges.Field of SearchSix-membered chalcogen ringTransition metal other than Group VIII DNRM (i.e., Sc, Ti, Mn, Cu, Y, Zr, Tc, Hf, Re) Transition metal atom (i.e., Fe,Co,Ni) Weight per unit area specified Of polycarbonate Of polyamide Next to polyester Addition polymer of hydrocarbon(s) only Next to addition polymer from unsaturated monomers Monoethylenically unsaturated Ester, halide or nitrile of addition polymer Monoolefin polymer Next to vinyl or vinylidene chloride polymer PRODUCT WITH MOLECULAR ORIENTATION |
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