You can freely build on How to Make Durable Non-Slip Surfaces Using Electron Beam Curing
This patent expired in 2013. 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
Norton Co
Patent granted
1995
Expired
2013
Forward citations
25
What this patent covers
This patent describes a way to create a non-slip material by gluing abrasive mineral particles onto a flexible plastic backing. The key is using a specific type of polyurethane adhesive that is cured—or hardened—using an electron beam. Because the adhesive is radiation-cured, it forms a strong, flexible bond that allows the entire sheet to be stretched or thermoformed into complex shapes without the grit falling off or the layers separating. This is useful for things like safety flooring or grip pads that need to wrap around curved surfaces.
What is now free to use
All 0 claims of US 5401560 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 non-slip materials that use heat-cured or air-dried adhesives instead of radiation-cured binders.
Does not cover materials where the abrasive particles are embedded into the plastic rather than bonded to the surface.
Does not cover adhesives that lack the specific blend of polyester urethane acrylate resin and the defined monomers.
Does not cover applications where the material cannot maintain at least 125% elongation before tearing.
Who is building on this today
Companies specializing in industrial abrasives and surface coatings, such as 3M and Saint-Gobain (which acquired Norton Co.), continue to refine high-performance adhesive technologies that rely on radiation-curing to achieve durability in flexible substrates.
Products built on expired version of this technology
Industrial safety floor treads
Non-slip grip pads for automotive interiors
Flexible safety tapes for stairs and ramps
Molded plastic components requiring high-friction surfaces
How to cite this patent in your documentation
Norton Co. US Patent 5401560. Polymer backed material with non-slip surface using E-beam cured urethane binder. Granted 1995, expired 2013. 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.