Patent News.

Stable polymer blends from a
two-step crosslinking process
U.S. patent: 6,063,867
Issued: May 16, 2000
Inventors: Zhi Wan, Chi-Ming Chan
and Jiarui Shen
Assigned: Hong Kong University of
Science & Technology; Hong Kong
Special Adm. Region of the People's
Republic of China
Keywords: Creating a durable cross-linked
polymer blend of otherwise
incompatible polymers by mixing
dicumyl peroxide and a partially crosslinked
polyolefin with a hompolymer
of a monovinyl substituted aromatic
compound and adding a block copolymer

Thermoplastic compositions
containing elastomers and fluorine
containing thermoplastics
U.S. patent: 6,066,697
Issued: May 23, 2000
Inventors: Aubert Y. Coran and Oansuk
Chung
Assigned: University of Akron
Keywords: Dynamically vulcanizing a
rubber that comprises a nitrile rubber, a
fluorine containing thermoplastic and a
vulcanizing agent

Track apparatus incorporating
non-pneumatic wheels
U.S. patent: 6,068,353
Issued: May 30, 2000
Inventors: Kenneth J. Juncker, Gary L.
Kelderman and Glenn W. Kahle
Assigned: AgTracks

[ILLUSTRATION OMITTED]

Vapor phase synthesis of cis-1,
4-polyisoprene
U.S. patent: 6,066,705
Issued: May 23, 2000
Inventors: Nissim Calderon, Kenneth
Floyd Castner, Howard Allen Colvin
and Joel Muse, Jr.
Assigned: Goodyear Tire & Rubber
Keywords: The isoprene is maintained
in the vapor phase by a suitable combination
of temperature and pressure and
the catalyst system suspended on an
inert solid support

Silica based aggregates, elastomers
reinforced therewith and tire with
tread thereof
U.S. patent: 6,068,694
Issued: May 30, 2000
Inventors: Yvon Andre Bernard, Uwe
Ernst Frank, Wolfgang Lauer, Friedrich
Visel, Rene Jean Zimmer and Thierry
Florent Edme Materne
Assigned: Goodyear Tire & Rubber

Thermoplastic elastomer triblend
from an engineering thermoplastic,
functionalized ethylene and/or diene
polymer, and brominated isobutylene
p-methylstyrene copolymer
U.S. patent: 6,069,202
Issued: May 30, 2000
Inventors: Krishna Venkataswamy and
Jacques Horrion
Assigned: Advanced Elastomer
Systems

Scorch retarded, crosslinkable
compositions of peroxide or AZO
compound curable thermoplastic
polymers, elastomeric polymers of
mixtures thereof containing
hydroquinones, sulfur accelerators
and peroxides or AZO compounds
U.S. patent: 6,069,208
Issued: May 30, 2000
Inventors: Michael Fred Novits,
Chester Joseph Kmiec and Edward
Phillip Hibbard
Assigned: Elf Atochem N.A. (Atofina)

Tire having silica reinforced rubber
tread with carbon black reinforced
rubber envelope
U.S. patent: 6,070,630
Issued: June 6, 2000
Inventors: Manauela Ponpei, Jean
Bergh, Ghislain Alolphe Leon Thise
and Georges Clement
Assigned: Goodyear Tire & Rubber

Rubber composition based on
carbon black having silica fixed to its
surface and on diene polymer functionalized
or modified with silanol
functions
U.S. patent: 6,071,995
Issued: June 6, 2000
Inventor: Gerard Labauze
Assigned: Michelin & Cie

High transverse-curvature tire, in
particular for front wheels of
motorvehicles
U.S. patent: 6,070,631
Issued: June 6, 2000
Inventors: Giancarlo Armellin, Nova
Milanese and Peter Kronthaler
Assigned: Pirelli Coordinamento Pneumatici
SPA

[ILLUSTRATION OMITTED]

Thermofusible elastomer
compositions
U.S. patent: 6,072,004
Issued: June 6, 2000
Inventors: Peter Migchels and Margaret
Ann Burns Clawson
Assigned: Shell Oil
Keywords: [A.sup.1][B.sup.1] block copolymer,
high melt flow polyolefin, plasticizing
oil, poly(conjugated diene) block compatible
resin

Methods for vulcanizing elastomers
using monomeric distillate
by-product
U.S. patent: 6,072,009
Issued: June 6, 2000
Inventors: Claude Frank Phillips, Jr.
and Alexander J. Conte
Assigned: Arizona Chemical
Keywords: Sulfur, a monomeric distillate
by-product of tall oil fatty acids

Powdered cosmetic compositions
containing silicone elastomers
U.S. patent: 6,074,672
Issued: June 13, 2000
Inventors: Brian John Dobkowski,
Alexander Paul Znaiden and Michael
Charles Cheney
Assigned: Chesebrough-Pond's USA,
Div. of Conopco
Keywords: Crosslinked non-emulsifying
siloxane elastomer, powdered inorganic
material, skin treatment agent

Flexible hose having an aluminum
layer to prevent ingestion of oxygen
U.S. patent: 6,074,717
Issued: June 13, 2000
Inventors: Kent H. Little and John A.
Barnes
Assigned: Dayco Porducts
Keywords: EPDM rubber with polybutadiene-maleic
anhydride adduct resin,
bonded to aluminum foil

[ILLUSTRATION OMITTED]

Latices from emulsified hydrocarbon
rubber solutions by membrane
separation
U.S. patent: 6,075,073
Issued: June 13, 2000
Inventors: Mark W. McGlothlin and
Eric V. Schmid
Assigned: Apex Medical Technologies
Keywords: Removing hydrocarbon solvent
by partitioning through a membrane

Rubber composition
U.S. patent: 6,075,092
Issued: June 13, 2000
Inventors: Masao Nakamura, Yukio
Takagishi and Katsumi Inagaki
Assigned: Nippon Zeon
Keywords: A diene rubber, an ethylene
oxide-propylene oxide-unsaturated
epoxide terpolymer

Wiper blade
U.S. patent: 6,077,592
Issued: June 20, 2000
Inventors: Ryou Azuma, Junichi Kurihara,
Noboru Umemoto and Fuminori
Satoji
Assigned: NTN and Nippon Water
Blade
Keywords: Coating layer comprising a
fluorine-containing resin having
hydroxyl groups

[ILLUSTRATION OMITTED]

Process for improving the properties
of ground recycled rubber
U.S. patent: 6,077,874
Issued: June 20, 2000
Inventors: Lawson Gibson Wideman,
George Frank Balogh, Raymond Dean
McQuate and Paul Harry Sandstrom
Assigned: Goodyear Tire & Rubber
Keywords: Dispersing tris(2-aminoethyl)
amine in recycled rubber

Heavy duty radial tire with specified
arrangement of chafer and carcass
turnup
U.S. patent: 6,079,467
Issued: June 27, 2000
Inventors: Kiyoshi Ueyoko
Assigned: Sumitomo Rubber

[ILLUSTRATION OMITTED]

Nylon modifiers having enhanced
flow properties
U.S. patent: 6,077,906
Issued: June 20, 2000
Inventor: Seshan Thiruvengada and
Robert C. Constable
Keywords: A thermoplastic polyamide,
a maleated EPDM and polyethylenes

Pneumatic tire with air permeation
prevention layer
U.S. patent: 6,079,466
Issued: June 27, 2000
Inventors: Jiro Watanabe and Tetsu
Kitami
Assigned: Yokohama Rubber
Keywords: Formed of a thermoplastic
resin film formed of at least two incompatible
resins, air permeation coefficient
25x[10.sup.-12]cc.cm/[cm.sup.2].s.cmHg at 30 [degrees] C

Low cost light weight radial tire
U.S. patent: 6,082,423
Issued: July 4, 2000
Inventors: Alain Emile Francois Roesgen,
Atte Smits, Eric Gerard Marie
Packbier, David Paterson Craig and
Marie-Rita Catherine Amelie Thise-Fourgon
Assigned: Goodyear Tire & Rubber

Rotary shaft seal having a PTFE seal
lip and a method and apparatus of
manufacturing same
U.S. patent: 6,079,715
Issued: June 27, 2000
Inventors: Rolf Johnen and Siegfried
Dunse
Assigned: Dichtungstechnik G. Bruss
GmbH & Co. KG
Keywords: An elastomer seat and a
PTFE seal lip

Kaolin clay in silica tread
compounds technical field
U.S. patent: 6,080,809
Issued: June 27, 2000
Inventor: Terrence Michael
Stuhldreher
Assigned: Bridgestone/Firestone
Keywords: A method for reducing low
strain modulus without reducing hardness
and high strain modulus

Adhesive for bonding elastomers to
metals
U.S. patent: 6,080,268
Issued: June 27, 2000
Inventors: Kerry C. Smith and
Bhawani S. Tripathy
Assigned: Federal-Mogul World Wide
Keywords: A silane adhesive and a
quaternary phosphonium salt

Process for preparation of slippery,
tenaciously adhering, hydrophilic
polyurethane hydrogel coating,
coated polymer and metal substrate
materials, and coated medical
devices
U.S. patent: 6,080,488
Issued: June 27, 2000
Inventors: Fritz Hostettler, David
Rhum, Michael R. Forman, Michael N.
Helmus and Ni Ding
Assigned: Schneider (USA)

TPV from hydrosilylation crosslinking
of acrylic modified bromo XP-50
butyl rubber
U.S. patent: 6,084,031
Issued: July 4, 2000
Inventors: Robert E. Medsker, Raman
Patel and Donald Wang
Assigned: Advanced Elastomer Systems

Pneumatic tires with carcass
anchored by bead wire reinforcing
layer
U.S. patent: 6,085,817
Issued: July 11, 2000
Inventor: Yuichiro Ogawa
Assigned: Bridgestone

Dispersible free flowing particulate
silica composition
U.S. patent: 6,086,669
Issued: July 11, 2000
Inventors: Shailesh D. Patkar, Harold
E. Swift and William B. Scott
Assigned: PPG Industries Ohio
Keywords: Amorphous precipitated silica,
hydrocarbon process oil, organic
carboxylic acid