- Email: [email protected]
4732748 Finely divided calcium carbonate compositions
Magnetic Resonance Imaging, Vol. 7, pp. I-X, 1989 Printed in the USA. All rights reserved.
073&725X/89 $3.00 + .oo 0 1989 Pergamon Press plc
Copyright
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH@ can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 oer CODY. Payment with order is reouired. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
in a particular
4732712 STEAM
INJECTION HEATER
fashion-broadly
particle size distribution.
WATER
Gregor Burnham, Jack Kahrs, Anthony
useful in aqueous slurry opacifying fillers for paper.
T Pos-
apparatus by a steam supply conduit which sup-
plies steam to the water supply conduit at a predetermined location between the water inlet end and the water outlet end of the water supply conduit. The steam entering the water supply conduit is controlled by a steam supply control valve located on the steam supply conduit. A pressure differential sensing means senses the difference in pressure along the water supply conduit between a first point in said water supply conduit, upstream of said predetermined location and a second point in the water supply conduit downstream of the predetermined location. A means for controlling the control valve means in response to this sensed pressure differential is also required.
or dry
form
as
4755755
luszny assigned to Leslie Controls Inc An apparatus for controlling the temperature of a supply of water by selective injection of steam is disclosed. The apparatus comprises a water supply conduit which includes a water inlet end and a water outlet end. Steam is supplied to the
stated: in fine
Such compositions are
COMPACT TRANSVERSE MAGNETIC GRADIENT COILS AND DIMENSIONING METHOD THEREFOR Joseph Carlson assigned to The Regents of the University of California
The axial dimensions of the usual saddle coils used to create transverse magnetic gradients in the static magnetic field of a magnetic resonance imaging system are substantially foreshortened. The outer arc of the saddle coil is moved axially inward while still leaving it at a position which
produces negligible net transverse gradient contribution. While this new position of the outer arc can be expected to produce a significant second (third) derivative of the transverse gradient with respect to Z (the orientation of the static magnetic field) at the predetermined ob-
servation point, the inner arc of the saddle coil may .be moved slightly away from the observa-
4732748 FINELY DIVIDED CALCIUM CARBONATE COMPOSITIONS Robert Stewart, Norman 0 Clark, Yew C Chang assigned to Cyprus Mines Corporation Finely divided, wet-ground, dispersant-free calcium carbonate filler or pigment compositions are disclosed in which the particles of calcium carbonate are distributed in particular amounts
tion point so as to produce a second (third) derivative which substantially cancels that of the relocated outer arc. In this manner, the desired condition of having a net zero second (third) derivative may still be maintained even though the axial dimension of the saddle coil has been substantially reduced (e.g., to about 44% of the traditional axial length in one exemplary embodiment). Such a more compact coil may permit realization of lowered inductance (and thus permit
faster gradient
switching
during
MRI
procedures) or, additional coil turns may be employed while still retaining the same inductance
073&725X/89 $3.00 + .oo 0 1989 Pergamon Press plc
Copyright
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH@ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH@ can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 oer CODY. Payment with order is reouired. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
in a particular
4732712 STEAM
INJECTION HEATER
fashion-broadly
particle size distribution.
WATER
Gregor Burnham, Jack Kahrs, Anthony
useful in aqueous slurry opacifying fillers for paper.
T Pos-
apparatus by a steam supply conduit which sup-
plies steam to the water supply conduit at a predetermined location between the water inlet end and the water outlet end of the water supply conduit. The steam entering the water supply conduit is controlled by a steam supply control valve located on the steam supply conduit. A pressure differential sensing means senses the difference in pressure along the water supply conduit between a first point in said water supply conduit, upstream of said predetermined location and a second point in the water supply conduit downstream of the predetermined location. A means for controlling the control valve means in response to this sensed pressure differential is also required.
or dry
form
as
4755755
luszny assigned to Leslie Controls Inc An apparatus for controlling the temperature of a supply of water by selective injection of steam is disclosed. The apparatus comprises a water supply conduit which includes a water inlet end and a water outlet end. Steam is supplied to the
stated: in fine
Such compositions are
COMPACT TRANSVERSE MAGNETIC GRADIENT COILS AND DIMENSIONING METHOD THEREFOR Joseph Carlson assigned to The Regents of the University of California
The axial dimensions of the usual saddle coils used to create transverse magnetic gradients in the static magnetic field of a magnetic resonance imaging system are substantially foreshortened. The outer arc of the saddle coil is moved axially inward while still leaving it at a position which
produces negligible net transverse gradient contribution. While this new position of the outer arc can be expected to produce a significant second (third) derivative of the transverse gradient with respect to Z (the orientation of the static magnetic field) at the predetermined ob-
servation point, the inner arc of the saddle coil may .be moved slightly away from the observa-
4732748 FINELY DIVIDED CALCIUM CARBONATE COMPOSITIONS Robert Stewart, Norman 0 Clark, Yew C Chang assigned to Cyprus Mines Corporation Finely divided, wet-ground, dispersant-free calcium carbonate filler or pigment compositions are disclosed in which the particles of calcium carbonate are distributed in particular amounts
tion point so as to produce a second (third) derivative which substantially cancels that of the relocated outer arc. In this manner, the desired condition of having a net zero second (third) derivative may still be maintained even though the axial dimension of the saddle coil has been substantially reduced (e.g., to about 44% of the traditional axial length in one exemplary embodiment). Such a more compact coil may permit realization of lowered inductance (and thus permit
faster gradient
switching
during
MRI
procedures) or, additional coil turns may be employed while still retaining the same inductance