Nova Patents
EP0343521A3

Breath protection mask

Abstract

According to the invention respirators are provided behind the filter with a gas sensor which gives signal, if the filter has reached its allowable load limit.

EP0343521A3, drawing sheet 1
Sheet 1 of 1

Term

Term ended

Projected expiry passed 19 May 2009, 17.3 years ago.

  1. Priority
  2. Filed
  3. Published
  4. Projected expiry
  5. Today

1 sheet

  1. Sheet 1