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Patent US3353564A successfully refreshed from Google Patents.
US3353564A
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US
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Laminar flow device
Assignee: Akzona Inc
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Filing: 1964-10-20
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Granted: 1967-11-21
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Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Jan V Bergeijk
- 👤 Nieuwenhuijsen Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:46
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/04; B; B01; B01F; B01F25/00; B01F25/40; B01F25/45; B01F25/452; B01F25/4523; B01J; B01J19/00; B01J19/24; B01J19/2415; B01J19/32; F; F15; F15D; F15D1/00; F15D1/02; F28; F28F; F28F13/00; F28F13/06; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094; B01J2219/00164; B01J2219/00166; B01J2219/32; B01J2219/324; B01J2219/32466; B01J2219/32475
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A FLOW TUBE FOR ACHIEVING UNIFORM VELOCITY DISTRIBUTION IN VISCOUS LIQUIDS, SAID FLOW TUBE HAVING SUPPORTED THEREIN TRANSVERSELY TO THE AXIS OF FLOW A PLURALITY OF PERFORATED BAFFLE MEANS, EACH OF SAID BAFFLE MEANS EXTENDING COMPLETELY ACROSS SAID FLOW TUBE AND SUCCESSIVE BAFFLE MEANS BEING SPACED AT INTERVALS LESS THAN 1/3 THE INSIDE DIAMETER OF SAID TUBE, THE CHARACTERISTIC WIDTH OF EACH PERFORATION IN SAID BAFFLE MEANS BEING LESS THAN 1/20 OF SAID TUBE DIAMETER, AND THE BAFFLE MEANS HAVING A THICKNESS LESS THAN TWICE THE DISTANCE BETWEEN ADJACENT PERFORATIONS WHEREBY TO OBTAIN LAMINAR VISCOUS LIQUID FLOW IN WHICH ALL LIQUID FRACTIONS WILL HAVE A UNIFORM RESIDENCE TIME IN SAID TUBE.
Claim 2
Dependent Claim
111 words
A FLOW TUBE FOR ACHIEVING UNIFORM VELOCITY DISTRIBUTION IN VISCOUS LIQUIDS, SAID FLOW TUBE HAVING SUPPORTED THEREIN TRANSVERSELY TO THE AXIS OF FLOW A PLURALITY OF PERFORATED BAFFLE MEANS, EACH OF SAID BAFFLE MEANS EXTENDING COMPLETELY ACROSS SAID FLOW TUBE AND SUCCESSIVE BAFFLE MEANS BEING SPACED AT INTERVALS LESS THAN 1/3 THE INSIDE DIAMETER OF SAID TUBE, THE CHARACTERISTIC WIDTH OF EACH PERFORATION IN SAID BAFFLE MEANS BEING LESS THAN 1/20 OF SAID TUBE DIAMETER, AND THE BAFFLE MEANS HAVING A THICKNESS LESS THAN TWICE THE DISTANCE BETWEEN ADJACENT PERFORATIONS WHEREBY TO OBTAIN LAMINAR VISCOUS LIQUID FLOW IN WHICH ALL LIQUID FRACTIONS WILL HAVE A UNIFORM RESIDENCE TIME IN 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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |