Patent US3298372A successfully refreshed from Google Patents.
US4175233A
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Flow cell and method for continuously monitoring deposits on flow surfaces
Assignee: Calspan Corp
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Filing: 1978-05-26
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Granted: 1979-11-20
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Expires: 1998-05-26
Abstract
Abstract A demountable, rectangular, liquid sample flow cell is provided which can be used to make streaming potential or streaming current measurements from which the zeta potential is calculated. By providing an infrared transparent window in the flow cell, a real-time monitoring of surface deposition rates and amounts can be determined by infrared radiometry. Because the flow cell is completely demountable, direct analysis of the internal surfaces exposed to the flowing solution is possible.
Inventors
- 👤 Vito A. DePalma
- 👤 Robert E. Baier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/05; G01N2021/0346
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A demountable flow cell having an inlet and an outlet with a flow path therebetween and including: a pair of mating housing members having corresponding recesses located therein; first and second plates receivable in respective ones of said corresponding recesses; shim means for separating said first and second plates when the flow cell is assembled and to define with said plates a portion of said flow path; means for holding said housing members in an assembled, flight tight relationship while permitting disassembly of said flow cell to permit direct examination of said plates defining said flow path.
Claim 2
Dependent Claim
97 words
A demountable flow cell having an inlet and an outlet with a flow path therebetween and including: a pair of mating housing members having corresponding recesses located therein; first and second plates receivable in respective ones of said corresponding recesses; shim means for separating said first and second plates when the flow cell is assembled and to define with said plates a portion of said flow path; means for holding said housing members in an assembled, flight tight relationship while permitting disassembly of said flow cell to permit direct examination of said plates defining said flow path.
Claim 3
Dependent Claim
26 words
The flow cell of claim 1 wherein one of said housing members has an optical path extending from the recess therein through said one housing member.
Claim 4
Dependent Claim
17 words
The flow cell of claim 2 wherein said first and second plates are transparent to infrared radiation.
Claim 5
Dependent Claim
76 words
A demountable flow cell for the direct examination of the adsorption process in a protein media including: first means defining a first flow path surface; second means defining a second flow path surface; third means for separating said first and second means; and fourth means for demountably securing said first, second and third means in a fluid tight relationship while permitting disassembly of said flow cell to permit direct examination of said first and second means.
Claim 6
Dependent Claim
76 words
A demountable flow cell for the direct examination of the adsorption process in a protein media including: first means defining a first flow path surface; second means defining a second flow path surface; third means for separating said first and second means; and fourth means for demountably securing said first, second and third means in a fluid tight relationship while permitting disassembly of said flow cell to permit direct examination of said first and second means.
Claim 7
Dependent Claim
21 words
The flow cell of claim 4 wherein at least one of said first and second means is transparent to infrared radiation.
Claim 8
Independent Claim
38 words
A method for directly examining deposits on flow surfaces including the steps of: flowing a sample containing an adsorbed species through a flow cell; disassembling the flow cell; and directly examining the internal surfaces of the flow cell.
Claim 9
Independent Claim
38 words
A method for directly examining deposits on flow surfaces including the steps of: flowing a sample containing an adsorbed species through a flow cell; disassembling the flow cell; and directly examining the internal surfaces of the flow cell.
Claim 10
Independent Claim
45 words
A method for continously monitoring deposits on flow surfaces including the steps of: flowing a sample containing an adsorbed species through a flow cell having a portion which is infrared transparent; monitoring deposits on the flow cell surfaces through the use of an infrared radiometer.
Claim 11
Independent Claim
45 words
A method for continously monitoring deposits on flow surfaces including the steps of: flowing a sample containing an adsorbed species through a flow cell having a portion which is infrared transparent; monitoring deposits on the flow cell surfaces through the use of an infrared radiometer.
Claim 12
Dependent Claim
24 words
The method of claim 7 further including the steps of: disassembling the flow cell; and, directly examining the internal surfaces of the flow cell.
References Cited (Backward Citations)
US3860818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |