Patent US3861652A successfully refreshed from Google Patents.
US3861652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing device
Assignee: EIDP Inc
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Filing: 1972-11-15
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Granted: 1975-01-21
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Expires: 1992-11-15
Abstract
Abstract The use of a screen structure between groups of static mixing elements located in a conduit through which tow or more liquids flow increases mixing efficiency.
Inventors
- 👤 Richard Allen Clark
- 👤 John William Coryell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:25
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4312; B01F25/45; B01F25/452; B01F25/4523; B01F25/45231
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
In a device for mixing a plurality of flowing liquids including a hollow cylindrical tube and a plurality of curved mixing elements positioned in said tube, the improvement comprising: said elements being formed in spaced groups and a cylindrical shaped screen positioned between at least two spaced groups of elements, said screen having a diameter less than the diameter of the conduit, said screen being connected to the walls of the conduit at one end and being closed at the other end.
Claim 2
Dependent Claim
82 words
In a device for mixing a plurality of flowing liquids including a hollow cylindrical tube and a plurality of curved mixing elements positioned in said tube, the improvement comprising: said elements being formed in spaced groups and a cylindrical shaped screen positioned between at least two spaced groups of elements, said screen having a diameter less than the diameter of the conduit, said screen being connected to the walls of the conduit at one end and being closed at the other end.
Claim 3
Dependent Claim
42 words
The device as defined in claim 1, including a second cylindrical shaped screen positioned between said groups of elements, said second screen being the same as the first screen and having its closed end adjacent the closed end of the first screen.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |