The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1993
Filed:
Jan. 21, 1992
Bjorn M Ludvigsson, Orviken, SE;
Ulf D Stromberg, Gothenburg, SE;
Boliden Contech AB, Stockholm, SE;
Abstract
The invention relates to a method of decreasing the risk of injury from mercury in conjunction with dental treatment. The invention is characterized by passing an effective air flow immediately outside the oral cavity in which the dental treatment is effected. The air flow, together with air removed by suction from the oral cavity when sucking saliva therefrom is passed through a first filter in which solid and liquid particles are extracted from the air flow. The air is then passed through a second filter which is capable of taking up essentially all of the mercury vapor present in the air. This filter is preferably a selenium filter.