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Treatment of artificial filaments, yarns, foils, films and the like containing organic derivatives of cellulose

US 2,112,237 A · Inventors: HENRY DREYFUS

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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 March 29, 1938. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 29, 1955.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 28, 1936
GrantedMarch 29, 1938
Term endedMarch 29, 1955
Application number—
Classification (CPC)D06M13/165
Length2 pages

Timeline

Timeline From USPTO dates

1937193919411943194519471949195119531955Application filedMarch 28, 1936Patent grantedMarch 29, 1938Term endedMarch 29, 1955

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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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