US5599513A
Expired / Lapsed
US
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Gas distribution plate for use with fluidized-bed gas-phase polymerizer
Assignee: Resonac Holdings Corp
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Filing: 1991-05-07
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Granted: 1997-02-04
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Expires: 2011-05-07
Abstract
Abstract A gas distribution plate for use with a fluidized-bed gas-phase polymerizer comprising a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in its surface. Each piece fits into a hole in the flat plate.
Inventors
- 👤 Toru Masaki
- 👤 Setuo Kawano
- 👤 Yuzo Saitoh
- 👤 Hirozo Ijiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:06
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/38; B01J8/44
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, said oblique hole or said spiral groove being disposed asymmetrically with respect to the central axis of said piece.
Claim 2
Dependent Claim
71 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, said oblique hole or said spiral groove being disposed asymmetrically with respect to the central axis of said piece.
Claim 3
Dependent Claim
33 words
A gas distribution plate according to claim 1, wherein each said cylindrical or frustoconical piece is a solid piece having a single oblique hole or a single spiral groove cut in said surface.
Claim 4
Dependent Claim
21 words
A gas distribution plate according to claim 2 wherein said cylindrical or frustoconical pieces have an oblique hole bored through them.
Claim 5
Dependent Claim
28 words
A gas distribution plate according to claim 3, wherein said pieces are fitted in different orientations so that a feed gas can be blown in any desired direction.
Claim 6
Dependent Claim
27 words
A gas distribution plate according to claim 3, wherein said pieces are fitted in such orientations as to create convolute gas flows over said gas distribution plate.
Claim 7
Dependent Claim
61 words
A gas distribution plate according to claim 3, wherein said pieces are oriented in the respective holes such that a feed gas is blown against corners of a fluidized-bed gas-phase polymerizer reactor having a sidewall with an inside surface, said corners being defined by the inside surface of the side wall of said fluidized-bed polymerizer reactor and said gas distribution plate.
Claim 8
Dependent Claim
18 words
A gas distribution plate according to claim 3, wherein said gas distribution plate is a one-piece solid plate.
Claim 9
Dependent Claim
22 words
A gas distribution plate according to claim 2, wherein said cylindrical or frustoconical pieces have a spiral groove cut in the surface.
Claim 10
Dependent Claim
36 words
A gas distribution plate according to claim 8, wherein said pieces have the same thickness as said flat plate so that no unevenness occurs in either the top or bottom surface of said gas distribution plate.
Claim 11
Dependent Claim
28 words
A gas distribution plate according to claim 8, wherein said pieces are fitted in different orientations so that a feed gas can be blown in any desired directions.
Claim 12
Dependent Claim
27 words
A gas distribution plate according to claim 8, wherein said pieces are fitted in such orientations as to create convolute gas flows over said gas distribution plate.
Claim 13
Dependent Claim
61 words
A gas distribution plate according to claim 8, wherein said pieces are presented in the respective holes such that a feed gas is blown against corners of a fluidized bed polymerizer reactor having a side wall having an inside surface, said corners defined by the inside surface of the side wall of said fluidized-bed polymerizer reactor and said gas distribution plate.
Claim 14
Dependent Claim
65 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece, said plurality of pieces being stacked one on another and fitting into a respective single hole in said flat plate to form a continuous passageway.
Claim 15
Dependent Claim
65 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece, said plurality of pieces being stacked one on another and fitting into a respective single hole in said flat plate to form a continuous passageway.
Claim 16
Dependent Claim
38 words
A gas distribution plate according to claim 13 wherein said stacked pieces collectively have the same thickness as said flat plate so that no unevenness occurs in either the top or bottom surface of said gas distribution plate.
Claim 17
Dependent Claim
77 words
A gas distribution plate according to claim 13, wherein a plurality of said pieces are stacked one on another in a single hole in the gas distribution plate such that a first piece having an oblique hole and a second piece having an oblique hole are placed in the hole in the gas distribution plate, and at least one piece having a vertical hole is present between said first and second pieces to form a continuous passageway.
Claim 18
Dependent Claim
101 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, and wherein said pieces are oriented in the respective holes such that a feed gas is blown against corners of a fluidized bed polymerizer reactor having a sidewall having an inside surface, said corners defined by the inside surface of the side wall of said fluidized-bed polymerizer reactor and said gas distribution plate.
Claim 19
Dependent Claim
101 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, and wherein said pieces are oriented in the respective holes such that a feed gas is blown against corners of a fluidized bed polymerizer reactor having a sidewall having an inside surface, said corners defined by the inside surface of the side wall of said fluidized-bed polymerizer reactor and said gas distribution plate.
Claim 20
Dependent Claim
80 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, wherein said pieces have the same thickness as said flat plate so that no unevenness occurs in either the top or bottom surface of said gas distribution plate.
Claim 21
Dependent Claim
80 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, wherein said pieces have the same thickness as said flat plate so that no unevenness occurs in either the top or bottom surface of said gas distribution plate.
Claim 22
Dependent Claim
77 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, and wherein said pieces are oriented in the respective holes such that a feed gas is blown in a generally convolute flow in said reactor.
Claim 23
Dependent Claim
77 words
A gas distribution plate for use with a fluidized-bed gas-phase polymerizer reactor comprising: a flat plate and a plurality of cylindrical or frustoconical pieces each having an oblique hole or a spiral groove cut in a surface of each piece and each piece fitting into a respective hole in said flat plate, and wherein said pieces are oriented in the respective holes such that a feed gas is blown in a generally convolute flow in said reactor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-02-04 | 2000-08-05 | 2001-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-04 | 2004-08-05 | 2005-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-04 | 2008-08-05 | 2009-02-04 | $7700.00 | Window Closed / Lapsed |