Expired, full termArchiveSolo inventor
Apparatus for igniting and operating gaseous discharge devices
US 2,920,237 A · Inventors: PAUL BERGER
Overview
The published document from the USPTO: abstract, claims, description and drawings. Open it full size
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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 January 5, 1960. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by January 5, 1977.
- We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledApril 22, 1955
GrantedJanuary 5, 1960
Term endedJanuary 5, 1977
Application number—
Classification (CPC)H01F38/10
Length4 pages
Timeline
Timeline From USPTO dates
Sources & verification
Official USPTO records
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Everything on this page comes from the USPTO record linked above.