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Sulphated amide wetting, detergent, and sudsing agents

US 2,355,503 A · Inventors: HEINRICH BERTSCH

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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 August 8, 1944. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 8, 1961.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 28, 1939
GrantedAugust 8, 1944
Term endedAugust 8, 1961
Application number—
Classification (CPC)C07C303/24 +2 more
Length2 pages

Timeline

Timeline From USPTO dates

19401943194619491952195519581961Application filedFeb 28, 1939Patent grantedAug 8, 1944Term endedAug 8, 1961

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

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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