Patent US3865352A successfully refreshed from Google Patents.
US3865352A
Expired / Lapsed
US
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Static mixing device
Assignee: 3M Co
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Filing: 1973-11-16
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Granted: 1975-02-11
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Expires: 1993-11-16
Abstract
Abstract A static in-line mixing tube for mixing a plurality of fluids during their passage through the tube comprises a hollow tube packed with shaped pieces, each comprising a disc having at least one projection perpendicularly attached thereto.
Inventors
- 👤 Charles Edward Nelson
- 👤 Clifford L Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:36
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/47; B01F25/00; B01F25/40; B01F25/45; B01F25/452; B01F25/4524; B29; B29B; B29B7/00; B29B7/30; B29B7/32; B29B7/325
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A static device for mixing a plurality of fluids comprising: a hollow cylindrical tube having an inlet and an outlet; and a plurality of shaped pieces filling said tube, said pieces comprising a circular disc having perpendicularly attached thereto at least one projection, the diameter of said disc being about 0.25 to 0.9 times the inner diameter of said tube and the length of said projection being about 0.25 to 0.75 times the inner diameter of said tube.
Claim 2
Dependent Claim
78 words
A static device for mixing a plurality of fluids comprising: a hollow cylindrical tube having an inlet and an outlet; and a plurality of shaped pieces filling said tube, said pieces comprising a circular disc having perpendicularly attached thereto at least one projection, the diameter of said disc being about 0.25 to 0.9 times the inner diameter of said tube and the length of said projection being about 0.25 to 0.75 times the inner diameter of said tube.
Claim 3
Dependent Claim
23 words
The device of claim 1, where said tube has at least one constriction in the inner diameter near the inlet of said tube.
Claim 4
Dependent Claim
26 words
The device of claim 1, where said shaped pieces are eyelets having an aperature in said disc in fluid communication with a bore in said projection.
Claim 5
Dependent Claim
38 words
The device of claim 1, where said disc has a diameter of about 0.4 to 0.65 times said inner diameter and said projection has a length of about 0.3 to 0.6 times the inner diameter of said tube.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |