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Means for producing time lag in electrical circuits

US 2,068,293 A · Inventors: ILGENFRITZ LESTER M

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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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  • Granted January 19, 1937. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by January 19, 1954.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 19, 1930
GrantedJanuary 19, 1937
Term endedJanuary 19, 1954
Application number—
Classification (CPC)H04J1/16
Length4 pages

Timeline

Timeline From USPTO dates

19311934193719401943194619491952Application filedMarch 19, 1930Patent grantedJan 19, 1937Term endedJan 19, 1954

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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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