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Low-temperature distillation of carbonizable material

US 1,721,997 A · Inventors: JACOBS KARL W J H

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted July 23, 1929. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by July 23, 1946.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledAugust 24, 1921
GrantedJuly 23, 1929
Term endedJuly 23, 1946
Application number—
Classification (CPC)C10B49/00
Length1 pages

Timeline

Timeline From USPTO dates

192219251928193119341937194019431946Application filedAug 24, 1921Patent grantedJuly 23, 1929Term endedJuly 23, 1946

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Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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