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Process of preparing artificial textile products with reduced luster from cellulose compounds

US 1,838,121 A · Inventors: ISIDOOR VLES SAMUEL

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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 29, 1931. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 29, 1948.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledSeptember 21, 1927
GrantedDecember 29, 1931
Term endedDecember 29, 1948
Application number—
Classification (CPC)D01F2/30
Length2 pages

Timeline

Timeline From USPTO dates

1928193119341937194019431946Application filedSep 21, 1927Patent grantedDec 29, 1931Term endedDec 29, 1948

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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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