Patent US3889631A successfully refreshed from Google Patents.
US3889631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for effecting fluidization in pyrolytic carbon coating processes
Assignee: United States Department of Energy
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Filing: 1974-03-18
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Granted: 1975-06-17
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Expires: 1994-03-18
Abstract
Abstract An improved gas distribution means which has utility in fluidized bed coaters for depositing pyrolytic carbon is described which consists of a plurality of gas-permeable regions within a supporting matrix comprising a relatively thick dimension for structural rigidity and relatively thin sections to inhibit clogging due to decomposition products of the fluidizing gas. A second gas distribution means feeds gas into a plenum below said first gas distribution means to insure a uniform pressurized zone of gas which serves as feed to said gaspermeable regions.
Inventors
- 👤 Jr Walter J Lackey
- 👤 John D Sease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:05
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/442; B; B01; B01J; B01J2/00; B01J2/006; B01J8/00; B01J8/18; B01J8/24; B01J8/44; Y; Y10; Y10S; Y10S118/00; Y10S118/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A FLUIDIZED BED COATER COMPRISING: A COATING CHAMBER AND HEATING MEANS THEREWITH, A POROUS PLATE DEFINING THE CHAMBER BOTTOM WALL AND THE UPPER WALL OF A PLENUM CHAMBER, MEANS FEEDING AND DISTRIBUTING A FLUIDIZING GASEOUS STREAM INTO SAID PLENUM CHAMBER, SAID GAS THEN PASSING THROUGH SAID POROUS PLATE TO EFFECT FLUIDIZATION OF PARTICULATE MATERIAL SUPPORTED ON SAID PLATE, SAID POROUS PLATE BEING RELATIVELY THICK, WHEREBY TO ADEQUATELY SUPPORT THE PARTICULATE MATERIAL IN A QUIESSENT STATE, AND HAVING A PLURALITY OF UNIFORMLY SPACED APERTURES THEREIN, A RELATIVELY THIN REPLACEABLE POROUS PLATE SUPPORTED IN EACH SAID APERTURE, AND SAID THIN PLATE OF A DIMENSION WHEREBY THE PASSAGEWAYS THEREOF WILL NOT CLOG DUE TO DECOMPOSITION PRODUCTS OF SAID GASEOUS STREAM.
Claim 2
Dependent Claim
117 words
A FLUIDIZED BED COATER COMPRISING: A COATING CHAMBER AND HEATING MEANS THEREWITH, A POROUS PLATE DEFINING THE CHAMBER BOTTOM WALL AND THE UPPER WALL OF A PLENUM CHAMBER, MEANS FEEDING AND DISTRIBUTING A FLUIDIZING GASEOUS STREAM INTO SAID PLENUM CHAMBER, SAID GAS THEN PASSING THROUGH SAID POROUS PLATE TO EFFECT FLUIDIZATION OF PARTICULATE MATERIAL SUPPORTED ON SAID PLATE, SAID POROUS PLATE BEING RELATIVELY THICK, WHEREBY TO ADEQUATELY SUPPORT THE PARTICULATE MATERIAL IN A QUIESSENT STATE, AND HAVING A PLURALITY OF UNIFORMLY SPACED APERTURES THEREIN, A RELATIVELY THIN REPLACEABLE POROUS PLATE SUPPORTED IN EACH SAID APERTURE, AND SAID THIN PLATE OF A DIMENSION WHEREBY THE PASSAGEWAYS THEREOF WILL NOT CLOG DUE TO DECOMPOSITION PRODUCTS OF SAID GASEOUS STREAM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |