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Surface deformation imaging process

US 3,674,591 A · Inventors: BOYD SHERMAN H JR

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Why it's free to use

  • Granted July 4, 1972. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by July 4, 1989.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledNovember 28, 1969
GrantedJuly 4, 1972
Term endedJuly 4, 1989
Application number—
Classification (CPC)G03F7/001 +1 more
Length5 pages

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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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