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Process for improving the properties of regenerated cellulose fibrous material wherein said material is treated while still in the gel state

US 2,902,391 A · Inventors: DAUL GEORGE C 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 September 1, 1959. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by September 1, 1976.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 23, 1957
GrantedSeptember 1, 1959
Term endedSeptember 1, 1976
Application number—
Classification (CPC)D06M15/55 +2 more
Length5 pages

Timeline

Timeline From USPTO dates

1958196019621964196619681970197219741976Application filedJan 23, 1957Patent grantedSep 1, 1959Term endedSep 1, 1976

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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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