Patent · US Expired

Disposable dust respirator

US4248220A · kind A · utility

84Cited by
4References
7Claims
0Family size

Assignee

Inventor

Key dates

Filing dateSep 10, 1979
Grant dateFeb 3, 1981
Priority date—
Expiry dateSep 10, 1999

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA41D13/1115
  • WIPO fieldOther consumer goods
  • WIPO sectorOther fields

Abstract

A disposable dust respirator which is self-opening and extends away from the mouth to provide more comfortable use.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.