Patents for May
Patents as collected from the USTPO by the editors of Rubber World for May 2025
Perfluoropolyether-Based Rubber Composition
Patent No.: US 12,071,510
Issued: August 27, 2024
Inventors: Ryuto Hayashi, Kenichi Fukuda
Assignee: Shin-Etsu Chemical
Summary: This patent covers a rubber composition based on perfluoropolyether, offering excellent resistance to heat, low temperatures, organic solvents, and acids. It includes a linear perfluoropolyether with azido groups and a divalent perfluoroalkyl ether structure, and another linear perfluoropolyether with at least three ethynyl groups.
Silicone Rubber for LED Headlamps
Patent No.: US 12,077,637
Issued: September 3, 2024
Inventors: Shigeki Shudo, Mikio Iino
Assignee: Shin-Etsu Chemical
Summary: This invention is an addition-curable liquid silicone rubber composition for LED headlamps. It contains alkenyl-containing organopolysiloxanes, a silicone resin with various siloxane units, organohydrogen polysiloxane, a platinum catalyst, and triallyl isocyanurate.
Tire Composition with Ethylene-Rich Elastomer
Patent No.: US 12,077,617
Issued: September 3, 2024
Inventors: Guillaume Pibre, Andrea Messina, Benjamin Gornard
Assignee: Michelin
Summary: This patent describes a tire rubber composition that includes a random copolymer with 50–95% ethylene units, a peroxide, and a specific acrylate derivative.
Olefin Multi-Block Copolymer/Silicone Rubber Foams
Patent No.: US 12,077,657
Issued: September 3, 2024
Inventors: Haiyang Yu, Xiaolian Hu, Hongyu Chen, Kyle G. Kummer
Assignee: Dow Global Technologies
Summary: The invention is a composition that combines olefin multi-block copolymers with silicone rubber containing pendant and optionally terminal vinyl groups.
Hybrid Tire Cord Manufacturing
Patent No.: US 12,084,793
Issued: September 10, 2024
Inventors: Min Ho Lee, Ok Hwa Jeon, Jongha Yim
Assignee: Kolon Industries
Summary: This method manufactures hybrid tire cords using industrial filaments such as nylon and polyester with high fineness (200 denier or more) compared to aramid filaments.
Tire Marking via Color Printing
Patent No.: US 12,076,954
Issued: September 3, 2024
Inventors: Olivier Muhlhoff, Walid Djabour
Assignee: Michelin
Summary: This method marks tires with colored prints on sidewalls while the tire is inflated above its nominal pressure.
Pneumatic Tire with Hatched Surface
Patent No.: US 12,090,796
Issued: September 17, 2024
Inventors: Stefan Rittweger, Juraj Jurco
Assignee: Continental
Summary: The patent describes a tire with hatched areas on the sidewalls or tread to enhance visual contrast and improve mold ventilation. Each hatching element includes ribs crossed by short transverse elevations.
High-Isotacticity Polybutadiene
Patent No.: US 12,084,536
Issued: September 10, 2024
Inventors: Shigenaga Takano, Shojiro Kaita, Kohtaro Osakada, Daisuke Takeuchi, Shinji Yamakawa
Assignee: Bridgestone
Summary: This invention provides a novel polybutadiene with a triad isotacticity (mm) of 72% or more, offering improved material properties.
Tire with Multi-Material Tread Sublayer
Patent No.: US 12,090,790
Issued: September 17, 2024
Inventors: Pascal Prost, Christopher Careme, David Dean
Assignee: Michelin
Summary: The tire features a tread sublayer composed of a base layer with stiffness A and a covering layer with higher stiffness B (where B > A > M), designed for enhanced performance and durability.
Rubber compounds for pneumatic tires comprising recycled carbon black
U.S. patent: 12,090,789
Issued: September 17, 2024
Inventors: Alessandra Calzetta and Alessandra Bartoloni
Assigned: Bridgestone
Key statement: A rubber compound for pneumatic tires comprising a crosslinkable
unsaturated-chain polymer base, carbon black, a silane bonding agent and a vulcanization
system. Part of the carbon black is carbon black from pyrolysis having a surface
functionalization deriving from a treatment with an aminoacidic compound comprising at
least one thiol group or a disulfide group.
Systems and methods for monitoring vehicles with tires
U.S. patent: 12,090,795
Issued: September 17, 2024
Inventors: Ghislain Laperle and David Gingras
Assigned: Camso
Key statement: A vehicle comprising wheels having tires can be monitored to obtain
information regarding the vehicle, including information regarding the wheels, such as an
indication of a physical state of a tire and/or other component of the wheel based on at
least 3D recognition and/or 2D recognition of image data of the tire and/or other wheel
component.
Tire tread rubber composition
U.S. patent: 12,103,334
Issued: October 1, 2024
Inventors: Jamie L. Whyte, Yasushi Yamagishi and Benjamin C. Galizio
Assigned: Bridgestone Americas Tire Operations
Key statement: Disclosed herein are tire tread rubber compositions comprising a
specified elastomer component, reinforcing silica filler, a specified hydrocarbon resin, a
cure package, and optionally oil. The elastomer component includes at least one styrene
butadiene rubber having a silica-reactive functional group; and natural rubber,
polyisoprene, or a combination thereof.
Microbial desulfurization and surface activation of rubber
U.S. patent: 12,103,985
Issued: October 1, 2024
Inventors: Anca Delgado, Elham Fini and Sk Faisal Kabir
Assigned: Arizona Board of Regents on behalf of Arizona State University
Key statement: Preparing a microbially desulfurized crumb rubber includes combining
microorganisms capable of breaking crosslinked sulfur bonds, sulfur-containing crumb
rubber and a salt solution to yield a mixture; combining a buffer with the mixture to yield
a buffered mixture, thereby adjusting a pH of the mixture; providing oxygen to the
buffered mixture; incubating the buffered mixture for a length of time to yield a
microbially desulfurized mixture; combining the microbially desulfurized mixture with
bitumen to yield a precursor; and heating the precursor to yield the microbially
desulfurized crumb rubber. The microbially desulfurized crumb rubber can be combined
with bitumen to yield a modified bitumen. The modified bitumen can be combined with
asphalt to yield a modified asphalt.
Rubber composition for tire
U.S. patent: 12,104,046
Issued: October 1, 2024
Inventors: Hiroki Sugimoto and Rie Nakajima
Assigned: Yokohama Rubber
Key statement: A rubber composition contains 10-50 parts by mass of a thermoplastic
resin in 100 parts by mass of a diene rubber containing 60 mass % or more of a styrene
butadiene rubber having a styrene content of 5-30 mass % and a vinyl content of 10-35
mass %. In a mixture containing the diene rubber and the thermoplastic resin in a mass
ratio of 1:1, a difference (Tga-Tgm) between a theoretical value (Tga) of a glass transition
temperature of the mixture calculated based on an average glass transition temperature
(Tg1) of the diene rubber and a glass transition temperature (Tg2) of the thermoplastic
resin and a measurement value (Tgm) of a glass transition temperature of the mixture, is
lower than 5°C and a difference (Tg2-Tg1) is 50-105°C. An amount of the thermoplastic
resin is 30 mass % or more in 100 mass % total of a plasticizer component contained in
the rubber compositio