You can freely build on How the Modern Kitchen Blender Works
This patent expired in 1942. Every claim — 0 independent, 0 dependent — is now unenforceable. Anyone can use, reproduce, manufacture, sell, or offer for sale this technology without a license.
Original assignee
ARNOLD ELECTRIC Co
Patent granted
1924
Expired
1942
Forward citations
33
What this patent covers
The device uses an electric motor housed in a base to drive a rotating agitator, or blade, located at the bottom of a removable container. By placing the agitator at the base rather than suspending it from above, the mixer creates a vortex that pulls ingredients down into the blades. This design allows for the efficient emulsification and blending of liquids and soft solids, fundamentally changing how drinks and food are prepared in the kitchen.
What is now free to use
All 0 claims of US 1480914 are in the public domain. Specifically:
The 0 dependent claims add narrowing limitations and are also free.
What is NOT covered
Patent expiry frees this specific invention. Separately-patented improvements made after expiry may still be protected.
Does not cover hand-cranked or manual mixing mechanisms.
Does not cover food processors that use S-shaped blades for chopping rather than mixing.
Does not cover immersion or stick blenders that are inserted into a separate container.
Who is building on this today
Companies like Vitamix, Blendtec, and Hamilton Beach continue to refine the high-speed motor and blade geometry first pioneered by this design. These manufacturers have evolved the basic concept into high-performance machines capable of pulverizing tough fibers and ice.
Products built on expired version of this technology
Osterizer blenders
Commercial milkshake mixers
Standard countertop kitchen blenders
How to cite this patent in your documentation
ARNOLD ELECTRIC Co. US Patent 1480914. Beverage mixer. Granted 1924, expired 1942. Now in the public domain.
Note: This is a convenience citation. Consult a patent attorney for formal freedom-to-operate analysis.
PatentBrief is an educational resource and does not provide legal advice. Patent expiration information is derived from USPTO records and may not reflect continuation patents, divisional filings, or separately-patented improvements. For commercial use or production decisions, obtain a formal freedom-to-operate (FTO) opinion from a registered patent attorney.