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Dye assistant for polyamides containing alkylene polyamines diamidated with fatty acids, polyethylene glycol fatty acid ester and an alkyl quaternary ammonium compound

US 3,399,953 A · Inventors: IRA SAPERS 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 3, 1968. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by September 3, 1985.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledOctober 2, 1967
GrantedSeptember 3, 1968
Term endedSeptember 3, 1985
Application number—
Classification (CPC)D06P1/6138 +2 more
Length2 pages

Timeline

Timeline From USPTO dates

196819701972197419761978198019821984Application filedOct 2, 1967Patent grantedSep 3, 1968Term endedSep 3, 1985

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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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