FR848525A - Improvements to protective masks against gases and other harmful products - Google Patents

Improvements to protective masks against gases and other harmful products

Info

Publication number
FR848525A
FR848525A FR848525DA FR848525A FR 848525 A FR848525 A FR 848525A FR 848525D A FR848525D A FR 848525DA FR 848525 A FR848525 A FR 848525A
Authority
FR
France
Prior art keywords
protective masks
against gases
harmful products
masks against
harmful
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Belge de lAzote et des Produits Chimiques du Marly SA
Original Assignee
Societe Belge de lAzote et des Produits Chimiques du Marly SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe Belge de lAzote et des Produits Chimiques du Marly SA filed Critical Societe Belge de lAzote et des Produits Chimiques du Marly SA
Application granted granted Critical
Publication of FR848525A publication Critical patent/FR848525A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/14—Check valves with flexible valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR848525D 1938-02-23 1939-01-06 Improvements to protective masks against gases and other harmful products Expired FR848525A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE848525X 1938-02-23

Publications (1)

Publication Number Publication Date
FR848525A true FR848525A (en) 1939-10-31

Family

ID=3882064

Family Applications (1)

Application Number Title Priority Date Filing Date
FR848525D Expired FR848525A (en) 1938-02-23 1939-01-06 Improvements to protective masks against gases and other harmful products

Country Status (2)

Country Link
ES (1) ES146601A1 (en)
FR (1) FR848525A (en)

Also Published As

Publication number Publication date
ES146601A1 (en) 1941-03-01

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