Patent US3982900A successfully refreshed from Google Patents.
US3982900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate for fluid-bed reactors
Assignee: Centro Sperimentale Metallurgico SpA
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Filing: 1975-06-16
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Granted: 1976-09-28
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Expires: 1995-06-16
Abstract
Abstract A plate for fluid bed reactors to insure uniform distribution of the fluidizing gas, comprises a pair of spaced opposed plates having holes therethrough, the holes in one plate being staggered relative to those of the other plate. The peripheral holes are larger than the central holes. The holes in the upper plate have upper frusto-conical parts and lower cylindrical parts, while the holes in the lower plate have upper cylindrical parts and lower frusto-conical parts. The plates have central holes closed by frusto-conical plugs operable from outside the associated apparatus to discharge material from the plate.
Inventors
- 👤 Giansilvio Malgarini
- 👤 Edoardo Pasero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:42
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/44; Y; Y02; Y02E; Y02E30/00; Y02E30/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A plate for fluid bed reactors, comprising spaced upper and lower plates having holes therethrough, the holes in the upper plate being staggered relative to the holes in the lower plate, said holes having frusto-conical enlargements at one end thereof, the frusto-conical enlargements of the holes in the upper plate being at the upper ends of the holes of the upper plate and the frusto-conical enlargements of the holes of the lower plate
Claim 2
Dependent Claim
73 words
A plate for fluid bed reactors, comprising spaced upper and lower plates having holes therethrough, the holes in the upper plate being staggered relative to the holes in the lower plate, said holes having frusto-conical enlargements at one end thereof, the frusto-conical enlargements of the holes in the upper plate being at the upper ends of the holes of the upper plate and the frusto-conical enlargements of the holes of the lower plate
Claim 3
Dependent Claim
13 words
A plate as claimed in claim 1, the distance between the plates being
Claim 4
Dependent Claim
27 words
A plate as claimed in claim 1, the distance by which the holes in one plate are laterally staggered from the closest holes in the other plate
Claim 5
Dependent Claim
27 words
A plate as claimed in claim 1, there being a series of peripheral holes in each plate and a plurality of central holes in each plate, said
Claim 6
Dependent Claim
17 words
A plate as claimed in claim 1, and a rim at the periphery of one of said
Claim 7
Dependent Claim
34 words
A plate as claimed in claim 1, and frusto-conical plugs closing frusto-conical openings in the central portions of said plates, and means to raise and lower said frusto-conical plugs thereby to open the central
Claim 8
Dependent Claim
47 words
A plate as claimed in claim 6, said frusto-conical plugs being coaxial with each other and with the plates, the larger bases of the frusto-conical plugs being their lower bases, the frusto-conical plug of the lower plate being of larger diameter than that of the upper plate.
References Cited (Backward Citations)
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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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |