Patents by Inventor Stuart C. Rennison
Stuart C. Rennison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4891285Abstract: An imaged copy film comprising (a) a polymeric film substrate, (b) an image-receiving layer comprising a terpolymer of a vinyl halide, a vinyl ester of a saturated aliphatic carboxylic acid and a functional group-containing unsaturated termonomer, and (c) an electrostatic copying toner image layer. Toner adhesion is improved and the applied images exhibit superior resistance to abrasion and erasure.Type: GrantFiled: November 1, 1988Date of Patent: January 2, 1990Assignee: Imperial Chemical Industries PLCInventors: Darrin J. Page, Stuart C. Rennison
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Patent number: 4711834Abstract: A laser-imageable assembly comprising a transparent substrate and an associated energy absorbent transfer layer comprising particles which absorb laser energy dispersed in a resin, the assembly comprising at least one further layer selected from(a) an intermediate priming layer,(b) a protective coating layer, and(c) a lubricant coating layer.The transfer layer is preferably rendered heterogeneous - for example, by appropriately drying the coated substrate.A preferred substrate is a polyester film.Type: GrantFiled: April 8, 1985Date of Patent: December 8, 1987Assignee: Imperial Chemical Industries PLCInventors: Alan Butters, Roger N. Barker, Stuart C. Rennison
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Patent number: 4626493Abstract: A laser-imageable assembly comprising a transparent substrate having on a surface thereof an energy absorbent transfer layer comprising particles which absorb laser energy dispersed in a heterogeneous resin layer. Heterogeneity may be achieved by appropriately drying the coated substrate.The assembly may also comprise one or more additional layers of primer, protective and lubricant coatings.A preferred assembly comprises a polyester substrate with a graphite-containing heterogeneous transfer layer.Type: GrantFiled: April 8, 1985Date of Patent: December 2, 1986Assignee: Imperial Chemical Industries PLCInventors: Alan Butters, Roger N. Barker, Stuart C. Rennison
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Patent number: 4363866Abstract: Process for forming a vesicular image utilizing a vesicular recording material having an imaging layer which includes a defined sulphone and/or sulphonamide additive in an amount of 1 to 100% by weight based upon the weight of a polymeric component of the plastics vehicle. The additive provides improved image density and a back-appearing image.Type: GrantFiled: April 14, 1981Date of Patent: December 14, 1982Assignee: Bedford LimitedInventors: Stuart C. Rennison, Ronald J. Stacey
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Patent number: 4289843Abstract: A photopolymerizable element suitable for use in the production of photorelief printing plates comprises a film or sheet, an adhesive layer and a photopolymerizable layer wherein the adhesive layer comprises a non-photopolymerizable plastics binder and a photopolymerization initiator comprising an admixture of a compound of the formula: ##STR1## preferably 4,4'-bis(dimethylamino)-benzophenone in an amount 0.01 to 2.0% by weight based upon the weight of the binder and another photopolymerization initiator in an amount 0.1 to 7% by weight based upon the weight of the binder.Type: GrantFiled: November 21, 1978Date of Patent: September 15, 1981Assignee: Bexford LimitedInventors: David L. Boutle, Stuart C. Rennison, Stuart G. Lambert
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Patent number: 4219616Abstract: Vesicular recording materials incorporate a sensitized layer comprising, as vehicle for the sensitizing agent, a quaternized polyelectrolyte, e.g. preferably polymers of dimethylamino ethyl methacrylate. The water sensitivity of the preferred polymers is reduced by copolymerisation with insolubilizing comonomers such as itaconic acid.Type: GrantFiled: November 20, 1978Date of Patent: August 26, 1980Assignee: Imperial Chemical Industries LimitedInventors: John A. Pope, Stuart C. Rennison, Ronald J. Stacey
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Patent number: 4131468Abstract: Modifying the surface of a diazotype material by incorporating an acrylic or methacrylic polymer into the diazotype sensitizing coating composition or coating the assembly with it so as to roughen the surface of the material thereby enabling nitrogen, which is liberated when the material is exposed to light, to escape from between the master and the diazotype material to prevent nitrogen accumulating between the two and hence avoiding slippage of one relative to the other.Type: GrantFiled: January 17, 1975Date of Patent: December 26, 1978Assignee: Imperial Chemical Industries LimitedInventors: Stuart C. Rennison, John A. Pope, Timothy D. Andrews
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Patent number: T977001Abstract: light-sensitive vesicular imaging materials, suitable for the production of labels, etc., comprise a light-sensitive vesicular imaging layer applied to one surface of a self-supporting plastics sheet or film preferably a polyester film, e.g., an oriented and heat-set film of polyethylene terephthalate, said light-sensitive vesicular imaging layer comprising a polymeric vehicle having uniformly dispersed therein a sensitizing agent which releases a vesicle-forming gas upon exposure to light and may comprise a nitrogent-liberating diazonium salt, said polymeric vehicle comprising a thermoplastic polymer having a nitrogent permeability constant (as defined in the specification) in the range 1 .times. 10.sup.-15 to 1 .times. 10.sup.-10 and being softenable upon heating above ambient temperature to permit the gas released by the sensitizing agent in the light-struck areas to form light-scattering or reflecting vesicles therein, e.g.Type: GrantFiled: October 17, 1977Date of Patent: December 5, 1978Assignee: Bexford Limited Imperial Chemical HouseInventors: Roy F. Huffey, David E. Lothian, Stuart C. Rennison, Michael K. Titman
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Patent number: T977002Abstract: light-sensitive vesicular imaging materials, suitable for the production of labels, etc., comprise a light-sensitive vesicular imaging layer applied to one surface of an opaque self-supporting plastics sheet or film, preferably a polyester film, e.g., an oriented and heat-set film of polyethylene terephthalate, said light-sensitive vesicular imaging layer comprising a polymeric vehicle having uniformly dispersed therein a sensitizing agent which releases a vesicle-forming gas upon exposure to light and may comprise a nitrogen-liberating diazonium salt, said polymeric vehicle comprising a thermoplastic polymer having a nitrogent permeability constant (as defined in the specification) in the range of 1 .times. 10.sup.-15 to 1 .times. 10.sup.-10 and being softenable upon heading above ambient temperature to permit the gas released by the sensitizing agent in the light-struck areas to form light scattering or reflecting vesicles therein, and an adhesive layer applied to the other surface of the sheet or film.Type: GrantFiled: October 17, 1977Date of Patent: December 5, 1978Assignee: Bexford Limited Imperial Chemical HouseInventors: Roy F. Huffey, David E. Lothian, Stuart C. Rennison, Michael K. Titman
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Patent number: T990001Abstract: Light-sensitive vesicular imaging materials, suitable for the production of colored labels, etc., comprise a light-sensitive vesicular imaging layer applied to one surface of a transparent self-supporting plastics sheet or film such as a linear polyester, e.g. polyethylene terephthalate film, said light-sensitive vesicular imaging layer comprising a polymeric vehicle having uniformly dispersed therein a sensitizing agent which releases a vesicle-forming gas, preferably nitrogen, upon exposure to light and optionally including a pigment or dye, said polymeric vehicle comprising a thermoplastic polymer having a nitrogen permeability constant in the range 1.times.10.sup.-15 to 1.times.10.sup.Type: GrantFiled: May 9, 1979Date of Patent: January 1, 1980Assignee: Bedford LimitedInventors: Roy F. Huffey, David E. Lothian, Stuart C. Rennison, Michael K. Titman