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Process for manufacture of wallboard from lignocellulosic material

US 2,537,101 A · Inventors: SMITH WARREN R 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 January 9, 1951. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by January 9, 1968.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJune 8, 1946
GrantedJanuary 9, 1951
Term endedJanuary 9, 1968
Application number—
Classification (CPC)D21J1/08
Length3 pages

Timeline

Timeline From USPTO dates

19471950195319561959196219651968Application filedJune 8, 1946Patent grantedJan 9, 1951Term endedJan 9, 1968

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

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