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Tone-on-tone acid dyeing blended textile of nylon and nylons with small amounts of phthalic acid sulfonic acid,phosphoric or phosphonic acid ester condensed therein and the textile so produced

US 3,475,111 A · Inventors: LENZ JURGEN 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 October 28, 1969. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by October 28, 1986.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
Filed—
GrantedOctober 28, 1969
Term endedOctober 28, 1986
Application number—
Classification (CPC)C08G69/02 +2 more
Length5 pages

Timeline

Timeline From USPTO dates

197019721974197619781980198219841986Patent grantedOct 28, 1969Term endedOct 28, 1986

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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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