Patent US3675902A successfully refreshed from Google Patents.
US3675902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing of fluid materials
Assignee: Union Carbide Corp
•
Filing: 1970-07-27
•
Granted: 1972-07-11
•
Expires: 1990-07-27
Abstract
Abstract Method and apparatus are disclosed for the mixing of fluid materials comprising providing a mixing zone having an inlet and an outlet; introducing said material through said inlet into said mixing zone; agitating said material in said mixing zone with a rotating, interrupted spiral ribbon agitator; disrupting the material flow in a region of interruption of said agitator to effect more intimate mixing; and withdrawing intimately mixed material through said outlet.
Inventors
- 👤 Walter R Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:32
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/20; B01F; B01F27/00; B01F27/80; B01F27/92; B01F27/921; B01F27/9213; B01J19/1862; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
107 words
Apparatus for mixing fluid materials comprising: a vessel of substantially circular cross-section having inlet means and outlet means permitting the addition of the fluids to be mixed and the withdrawal of mixed fluids to maintain a fluid level in said vessel; spiral ribbon agitator means rotatably mounted in said vessel near the walls thereof and positioned to provide flow in one axial direction in the flow region near said walls and opposite axial-direction flow in the central flow region within said agitator means, said agitator means having at least one interruption in continuity; and baffle means positioned in a region of said interruption of said agitator means.
Claim 2
Dependent Claim
107 words
Apparatus for mixing fluid materials comprising: a vessel of substantially circular cross-section having inlet means and outlet means permitting the addition of the fluids to be mixed and the withdrawal of mixed fluids to maintain a fluid level in said vessel; spiral ribbon agitator means rotatably mounted in said vessel near the walls thereof and positioned to provide flow in one axial direction in the flow region near said walls and opposite axial-direction flow in the central flow region within said agitator means, said agitator means having at least one interruption in continuity; and baffle means positioned in a region of said interruption of said agitator means.
Claim 3
Dependent Claim
12 words
Apparatus in accordance with claim 1, wherein said vessel comprises a reactor.
Claim 4
Dependent Claim
23 words
Apparatus in accordance with claim 1, wherein volatile venting means are provided near the upper end of said vessel above said inlet means.
Claim 5
Dependent Claim
27 words
Apparatus in accordance with claim 1, wherein said agitator means is helical in shape and is positioned in close clearance with the side walls of said vessel.
Claim 6
Dependent Claim
19 words
Apparatus in accordance with claim 1, wherein said baffle means are secured to said side walls of said vessel.
Claim 7
Dependent Claim
19 words
Apparatus in accordance with claim 1, wherein said baffle means have projections from radial positions of said baffle means.
Claim 8
Dependent Claim
24 words
Apparatus in accordance with claim 1, wherein a plurality of such vessels, containing interrupted spiral ribbon agitator and baffle means, are employed in series.
Claim 9
Dependent Claim
16 words
Apparatus in accordance with claim 7, wherein at least one of said vessels comprises a reactor.
Claim 10
Dependent Claim
23 words
Apparatus in accordance with claim 7, wherein volatile venting means are provided near the upper end of said vessel above said inlet means.
References Cited (Backward Citations)
US3253818A
Cited
US3392963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |