Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/06—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings linked by a carbon chain containing only aliphatic carbon atoms
• • E—FIXED CONSTRUCTIONS
  • E21—EARTH DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
  • E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
  • E21C25/28—Chains or chain guides
  • E21C25/34—Chains
  • E21C25/36—Couplings for links
  • E21C25/365—Couplings for links allowing the bending into at least two planes

Applications Claiming Priority (1)

Publications (1)

Family

ID=4322819

Family Applications (2)

Family Applications After (1)

Country Status (5)

• 0
  • BE BE493336D patent/BE493336A/xx unknown
• 1961
  • 1961-06-22 CH CH729161A patent/CH390248A/de unknown
• 1962
  • 1962-06-19 GB GB2353862A patent/GB1009440A/en not_active Expired
  • 1962-06-20 DE DE1962G0035262 patent/DE1297106B/de active Pending
  • 1962-06-20 ES ES278519A patent/ES278519A1/es not_active Expired
  • 1962-06-21 BE BE619215A patent/BE619215A/fr unknown

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