Patents by Inventor Hendrik F. Weyn

Hendrik F. Weyn 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: 4357317
    Abstract: A dental cream composition containing a binary fluorine providing system which provides about 1000-1670 ppm (0.1-0.16% by weight) fluorine from sodium monofluorophosphate and sodium fluoride wherein sodium fluoride provides about 30-35% by weight of the fluorine in amount of about 300-580 ppm (0.02-0.058% by weight). The dental cream contains a vehicle for the binary fluorine-providing system and about 20-75% by weight of a dentally acceptable water-insoluble polishing agent consisting essentially of dicalcium phosphate intimately dispersed in the vehicle and in direct contact with the binary fluorine-providing system. The dental cream is effective in retaining soluble fluorine and soluble fluoride, in effecting reduction of enamel solubility and in remineralization of dental enamel.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: November 2, 1982
    Assignee: Colgate-Palmolive Company
    Inventors: Hendrik F. Weyn, Eric Baines, Kenneth Harvey
  • Patent number: 4211341
    Abstract: A stabilized and extrudable paste or gel dentifrice comprises two dentifrice portions, each of which includes a component which is chemically reactive with the other such component in the other portion, with the portions being maintained separate from each other in a dispensing container from which they are dispensable together through a closable opening therein in response to pressure. One of the reactive compounds may be an alkali metal fluorine-containing salt such as sodium fluoride or sodium monofluorophosphate, used for its effect in hardening tooth enamel, and the other may be a water insoluble calcium salt, such as dicalcium phosphate, tricalcium phosphate or calcium carbonate, used as a polishing agent. To improve storage stability of the dentifrice such dentifrice portions are separated by an extrudable material, such as a polyhydric alcohol-water gel of a gum, e.g., sodium carboxymethyl cellulose. Also within the invention are various methods for the manufacture of the mentioned dentifrices.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: July 8, 1980
    Assignee: Colgate-Palmolive Company
    Inventor: Hendrik F. Weyn