US4327042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draft device for a bubble column
Assignee: KH Neochem Co Ltd
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Filing: 1980-12-22
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Granted: 1982-04-27
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Expires: 2000-12-22
Abstract
Abstract Disclosed is an improved draft device for a bubble column used in a reaction wherein gas and liquid are mixed such as fermentation. The draft device consists of a plurality of vertical plates coaxially arranged within the bubble column such that each plate has one vertical edge in outwardly spaced overlapping relation to a vertical edge of an adjacent plate and has the other vertical edge in inwardly spaced overlapping relation to a vertical edge of the other adjacent plate.
Inventors
- 👤 Hiroshi Hagino
- 👤 Hideo Odagiri
- 👤 Junichi Okutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:53
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/22; C02F3/223; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232; B01F23/2323; B01F23/23231; B01F23/232311; B01F35/00; B01F35/30; B01F35/32; B01F35/32005; B01F35/3203; B01J; B01J10/00; B01J10/002; B01J19/00; B01J19/0053; B01J19/006; B01J19/24; B01J19/2455; B01J19/246; C12; C12M; C12M27/00; C12M27/18; C12M27/20; C12M29/00; C12M29/06; C12M29/08; B01F35/32015; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S435/00; Y10S435/818
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
In a bubble column for reactions wherein gas and liquid are mixed comprising a cylindrical vertically disposed column and means for introducing a gas to the bottom of said column, an improved draft device which comprises a plurality of plates coaxially disposed within said column; each of said plates having one vertical edge in outwardly spaced, overlapping relation to a vertical edge of adjacent plate, and the other vertical edge in inwardly spaced, overlapping relation to a vertical edge of the other adjacent plate.
Claim 2
Dependent Claim
84 words
In a bubble column for reactions wherein gas and liquid are mixed comprising a cylindrical vertically disposed column and means for introducing a gas to the bottom of said column, an improved draft device which comprises a plurality of plates coaxially disposed within said column; each of said plates having one vertical edge in outwardly spaced, overlapping relation to a vertical edge of adjacent plate, and the other vertical edge in inwardly spaced, overlapping relation to a vertical edge of the other adjacent plate.
Claim 3
Dependent Claim
37 words
An improved draft device according to claim 1 wherein said plates are disposed whereby said overlap provides a total surface area of the plates of 1 to 4 times the apparent surface area of the draft device.
Claim 4
Dependent Claim
16 words
An improved draft device according to claim 1 wherein said plates are arcuate in transverse cross-section.
Claim 5
Dependent Claim
17 words
An improved draft device according to claim 1 wherein said plates are vertically disposed within said column.
Claim 6
Dependent Claim
16 words
An improved draft device according to claim 4 wherein said plates are arcuate in transverse cross-section.
Claim 7
Dependent Claim
32 words
An improved draft device according to claim 5 wherein the centers of the arcs of said plates define a circle which is 0.65 to 0.75 that of the diameter of said column.
Claim 8
Dependent Claim
19 words
An improved draft device according to claim 1 wherein said plates are disposed within said column as a frustrum.
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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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |