Patents by Inventor Wang You Tong

Wang You Tong 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).

  • Patent number: 6638458
    Abstract: A method of manufacturing disposable tableware products is taught using a degradable composite material including the following components by weight in parts: a plant fiber, 60-90 parts; a urea-formaldehyde resin, 10-35 parts; a melamine resin, 3-10 parts; and a food coloring agent, 1-10 parts; wherein the molecular weight of said urea-formaldehyde resin is 300-600, including: (1) pulverizing the plant fiber into 60 mesh or over and thoroughly mixing the plant fiber with the urea-formaldehyde resin and the melamine resin proportionately to form a mixture of the degradable composite material; (2) feeding the mixture of the degradable composite material into a concave molding mould positioned in an operating platform of a hydraulic press wherein the press is capable of moving in an upward direction in a fixed quantity and position; maintaining the temperature of the mould at 125-190° C.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: October 28, 2003
    Assignee: Enviro Concept Ltd.
    Inventor: Wang You Tong
  • Patent number: 6624217
    Abstract: There is disclosed a plant fiber composite material that is environmentally benign. There is also disclosed products of the plant fiber composite material, a processing method for the plant fiber composite material, and extruded or molded products using the plant fiber composite material.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: September 23, 2003
    Inventor: Wang You Tong
  • Publication number: 20030143386
    Abstract: There is disclosed a kind degradable material and its disposable products, and their manufacturing process. The primary raw material used in the process consists of powdered shell or stalk of crops, urea-formaldehyde resin, and melamine resin. The materials are mixed thoroughly and hot pressed in a single step forming of the products. Oven drying or spray coating is not needed in the process. The products have the following characteristics: simple formula, simple process, low price; and the following properties: with natural color, dense; tough and tensile; and easy for coloring. In addition, they are water, heat and freezing resistant, anti-corrosion, non-poisonous, anti-pollution and biodegradable. They are entirely new environmental protection green products.
    Type: Application
    Filed: December 2, 2002
    Publication date: July 31, 2003
    Applicant: Enviro Concept Ltd.
    Inventor: Wang You Tong
  • Publication number: 20030137075
    Abstract: There is disclosed a kind degradable material and its disposable products, and their manufacturing process. The primary raw material used in the process consists of powdered shell or stalk of crops, urea-formaldehyde resin, and melamine resin. The materials are mixed thoroughly and hot pressed in a single step forming of the products. Oven drying or spray coating is not needed in the process. The products have the following characteristics: simple formula, simple process, low price; and the following properties: with natural color, dense; tough and tensile; and easy for coloring. In addition, they are water, heat and freezing resistant, anti-corrosion, non-poisonous, anti-pollution and biodegradable. They are entirely new environmental protection green products.
    Type: Application
    Filed: October 11, 2002
    Publication date: July 24, 2003
    Applicant: Enviro Concept Ltd.
    Inventor: Wang You Tong
  • Patent number: 6488997
    Abstract: There is disclosed a kind degradable material and its disposable products, and their manufacturing process. The primary raw material used in the process consists of powdered shell or stalk of crops, urea-formaldehyde resin, and melamine resin. The materials are mixed thoroughly and hot pressed in a single step forming of the products. Oven drying or spray coating is not needed in the process. The products have the following characteristics: simple formula, simple process, low price; and the following properties: with natural color, dense; tough and tensile; and easy for coloring. In addition, they are water, heat and freezing resistant, anti-corrosion, non-poisonous, anti-pollution and biodegradable. They are entirely new environmental protection green products.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: December 3, 2002
    Assignee: Enviro Concept Ltd.
    Inventor: Wang You Tong