Patents by Inventor Martinus Boersma

Martinus Boersma 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: 4651892
    Abstract: The invention relates to a container, comprising: a tubular body with at least one open end, wherein a part of the body adjacent to the end is provided with a bent body rim; a cover closing the open end having a cover rim which grips over the bent body rim; and a locking ring encircling the cover rim and the bent body rim which assures against a relative displacement of the cover in relation to the body. In order to lessen the danger of the occurrence of open contact at the end wall portions, for example be dropping, the curled body rim is additionally curled and/or the body is provided with a groove extending over at least parts of the body circumference, on which a part of the locking ring turned away form the open end of the body can support, and/or the locking ring is provided with a release element arranged in and across it.
    Type: Grant
    Filed: June 24, 1985
    Date of Patent: March 24, 1987
    Assignee: Thomassen & Drijver-Verblifa N.V.
    Inventor: Martinus Boersma