Expired, full termArchiveSolo inventor
Fountain pen
US 2,339,860 A · Inventors: DAVID KAHN et al.
Overview
1 drawing sheet
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 January 25, 1944. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by January 25, 1961.
- We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledOctober 31, 1942
GrantedJanuary 25, 1944
Term endedJanuary 25, 1961
Application number—
Classification (CPC)B43K5/06
Length5 pages
Sources & verification
Official USPTO records
Cross-check elsewhere
Everything on this page comes from the USPTO record linked above.