F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
LIGHTING; HEATING
 F27
FURNACES; KILNS; OVENS; RETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned per se in that class, see the class in question, e.g. bakery ovens A21B, glass melting furnaces C03B, coke or gas-making apparatus C10B, C10J, apparatus for cracking hydrocarbons C10G, blast furnaces C21B, converters for making steel C21C, furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B)  [4]
 F27

Note(s)

  1. This class covers:
    • furnaces, kilns, ovens, retorts, open sintering apparatus, and details or accessories therefor, in general;
    • the arrangement of electrical heating elements in or on furnaces.
  2. This class does not cover:
    • electrical heating elements per se;
    • processes carried on within the furnaces.
  3. In this class, the following term is used with the meaning indicated:
    • "furnaces" covers kilns, ovens, or retorts.
 F27B
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
 F27B

Note(s)

Attention is drawn to the references and Notes following the title of class F27 and the Note III following the Contents of Section of section H.


 F27D
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE (combustion apparatus per se F23)
 F27D

Note(s)

Attention is drawn to the references and Notes following the title of class F27 and Note III following the Contents of Section of section H.