Expired, full termArchiveSolo inventor
Forced air-cooled thermally calibrated circuit breaker
US 3,213,232 A · Inventors: GRYETKO CARL E
Overview
4 drawing sheets
Every sheet is in the USPTO PDF.
Open the USPTO PDFRead the whole patent
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 October 19, 1965. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by October 19, 1982.
- We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMay 9, 1963
GrantedOctober 19, 1965
Term endedOctober 19, 1982
Application number—
Classification (CPC)H01H9/52
Length9 pages
Sources & verification
Official USPTO records
Cross-check elsewhere
Everything on this page comes from the USPTO record linked above.