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Lighting unit and reflector therefor

US 1,658,716 A · Inventors: HALVORSON JR CROMWELL A B

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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 February 7, 1928. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 7, 1945.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledSeptember 2, 1924
GrantedFebruary 7, 1928
Term endedFebruary 7, 1945
Application number—
Classification (CPC)F21V7/04
Length3 pages

Timeline

Timeline From USPTO dates

1925192819311934193719401943Application filedSep 2, 1924Patent grantedFeb 7, 1928Term endedFeb 7, 1945

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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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