Patents by Inventor Paul Y. Wang

Paul Y. Wang 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: 5110595
    Abstract: Implant preparations capable of sustained action when inserted are comprised of powder of a natural lipoidal substance in thorough admixture with bioactive macromolecule, followed by compression under pressure into a disc or rod that can be broken and used in small pieces as well.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: May 5, 1992
    Inventor: Paul Y. Wang
  • Patent number: 4976695
    Abstract: An implant comprises interconnected compartments with intlet and outlet and can be used for sampling of entered serous fluid or to hold drug concentrate for selective delivery, if desired. The compartments are formed by sealing around porous foam rings between a top and a bottom layer of biocompatible elastic membrane with a polymer paste which sets to form a rubbery shell. The top membrane layer over the compartment is punctured to create a small resealable channel. Upon subcutaneous implantation, serous fluid under hydrostatic pressure seeps into the interior through the puncture orifice. The entered fluid may be withdrawn by an hypodermic syringe through the rubbery side wall to obtain serum-borne bioactive materials. If a drug concentrate is included, the entered fluid will dissolve some of the drug therein. When delivery is required, external sidewise compression of the elastic compartment over the skin fold expels the drug containing solution therein through the orifice.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: December 11, 1990
    Inventor: Paul Y. Wang
  • Patent number: 4857055
    Abstract: A compression device, which enables standard-size flexible solution containers to infuse at a constant flow rate, comprises a rigid external casing, in combination with two leak-proof sacs inflatable by a low pressure gas, and a flow moderator system. The flexible solution container must be positioned evenly in-between the inflatable sacs in order to obtain constant delivery rate while discharging about 80% of its intended maximum content. Flow moderators connected in series with by-passes can provide flow rates in discrete steps. The disposable compression device is adaptable to drug infusion and fluid replenishment therapy.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: August 15, 1989
    Inventor: Paul Y. Wang
  • Patent number: 4793336
    Abstract: The method of making skin covering materials especially for wounds comprising dextran C insolubilized by reaction with epichlorohydrin in combination with a suitable humectant. The compositions may be formed into coherent, self-supporting sheets of the insolubilized dextran C impregnated with humectant material, or in the form of pastes applied to the wound as such. The humectant material is preferably glycerin or isopropanolpropylene glycol and an oil. The wound covering material allows sufficient removal of exuded body fluid and seals the wound site against bacterial infection, while at the same time maintaining the wound moist to prevent scale formation. The method may include incorporating medicaments into the wound covering material, to assist in healing and further to safeguard against bacterial infection.
    Type: Grant
    Filed: December 5, 1986
    Date of Patent: December 27, 1988
    Inventor: Paul Y. Wang
  • Patent number: 4643179
    Abstract: Skin covering materials especially for wounds comprise dextran C insolubilized by reaction with epichlorohydrin in combination with a suitable humectant. The compositions may be in the form of coherent, self-supporting sheets of the insolubilized dextran C impregnated with humectant material, or in the form of pastes applied to the wound as such. The humectant material is preferably glycerin or isopropanolpropylene glycol and an oil. The wound covering material allows sufficient removal of exuded body fluid and seals the wound site against bacterial infection, whilst at the same time maintaining the wound moist to prevent scale formation. Medicaments may additionally be incorporated into the wound covering material, to assist in healing and further to safeguard against bacterial infection.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: February 17, 1987
    Inventor: Paul Y. Wang