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US 2,139,783 A · Inventors: TUYL SIDNEY E VAN

USPTO PDF

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11 drawing sheets

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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.

Why it's free to use

  • Granted December 13, 1938. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 13, 1955.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 8, 1935
GrantedDecember 13, 1938
Term endedDecember 13, 1955
Application number—
Classification (CPC)A63F7/027
Length20 pages

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