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Method of obtaining phytosterol, fatty acids and resin acids from raw soap or liquidresin obtained in the manufacture of cellulose according to the sulphate method

US 1,940,372 A · Inventors: EMELIE SANDQVIST EMMA et al.

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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 December 19, 1933. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 19, 1950.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledAugust 12, 1931
GrantedDecember 19, 1933
Term endedDecember 19, 1950
Application number—
Classification (CPC)C07J75/00 +1 more
Length1 pages

Timeline

Timeline From USPTO dates

1932193419361938194019421944194619481950Application filedAug 12, 1931Patent grantedDec 19, 1933Term endedDec 19, 1950

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Official USPTO records

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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