Patent FR-1855-22979

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Sources

  • Advanced Research page of INPI website

http://bases-brevets19e.inpi.fr/index.asp?page=rechercheAvancee


(Original is particularly worth examination, revealing a 20 year Belgian patent registered on 3 March 1855, revealing the inventor Piret, otherwise not showing up, and revealing the detail of "Prussia", which we may want to distinguish(?), being that some years of historical note pre-date German unification. The date 27 March 1855 seems properly to be filing date by way of "verbal process".

(Regarding number of diagrams, there seem to be three, though they are not numbered, and the impression is abstract in the extreme.


inpi.fr Original of French patent making reference hereto

  • Inventor location: 20 rue du Helder, Paris, Seine, France (This is actually the patent agent location.)


Year filed 1855
Year granted 1855
Office FR
Patent number 22979
Inventors Frédéric-Marie Piret, Carl Armbruster, Louis de Cherrier
Inventor country FR, Prussia, Belgium
Applicant person Frédéric-Marie Piret, Carl Armbruster, Louis de Cherrier
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title système propre à empêcher les explosions occasionnées par le gaz hydrogène protocarbone ( grisou ) dans les houillères
English title manner of preventing explosions causes by hydrogen protocarbon
Tech fields gas, safety, LTA
Filing date March 27, 1855
Full specification filed date
Application number
Grant date June 18, 1855
Granted? Yes
Publication date
Supplementary to patent Patent BE-1855-F-M-P C-A L-d-C
Related to aircraft? Yes
Serial number
Patent agent Douau de Lucy
Assigned to
National tech categories
IPCs
CPCs
Family year
First filing? No
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages 28
Number of diagram pages 1
Number of figures 3
Number of claims