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Method of and apparatus for spinning doubling and threading staple fibers and/or silk

US 3,616,632 A · Inventors: SILBERMANN KARL HEINZ et al.

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3 drawing sheets

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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 November 2, 1971. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by November 2, 1988.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMay 7, 1969
GrantedNovember 2, 1971
Term endedNovember 2, 1988
Application number—
Classification (CPC)D02G3/281
Length10 pages

Sources & verification

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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