Expired, full termArchiveSolo inventor
Concrete-pipe-bend machine
US 1,574,433 A · Inventors: MACKENZIE WILLIAM J
Overview
3 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 February 23, 1926. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 23, 1943.
- We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJune 2, 1924
GrantedFebruary 23, 1926
Term endedFebruary 23, 1943
Application number—
Classification (CPC)B28B21/74
Length7 pages
Sources & verification
Official USPTO records
Cross-check elsewhere
Everything on this page comes from the USPTO record linked above.