Patent US4162979A successfully refreshed from Google Patents.
US4162979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the chemical and/or physical treatment of liquids
Assignee: Roche Diagnostics GmbH
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Filing: 1977-10-18
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Granted: 1979-07-31
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Expires: 1997-10-18
Abstract
Abstract A device for the chemical and/or physical treatment of liquids which comprises a flowthrough vessel having an inlet and an outlet and is receptive of a treatment agent therebetween. The vessel comprises a substantially cylindrical tube having one end at the outlet and a conically widening tube section connected to the other end of the cylindrical tube. A permeable carrier is mounted in the cylindrical tube at the outlet end to support the treatment agent placed in the cylindrical tube.
Inventors
- 👤 August W. Wahlefeld
- 👤 Siegfried Looser
- 👤 Klaus A. Sturmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; B; B01; B01D; B01D15/00; B01L; B01L3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
176 words
A device for the treatment of liquids, comprising a flowthrough vessel having an inlet and an outlet and containing therein a treatment agent between the inlet and the outlet, the flowthrough vessel comprising a substantially cylindrical tube having one end at the outlet and a conically widening tube section connected to the other end of said cylindrical tube and, integral therewith, a permeable carrier configured to be insertable into the cylindrical tube through the outlet end thereof for supporting thereupon the treatment agent within the cylindrical tube and means for maintaining the permeable carrier in position within the cylindrical tube, said means comprising a supporting shoulder extending radially inwardly from the inner wall of the cylindrical tube at the outlet end, wherein the permeable carrier, after insertion, rests against the shoulder and a holding ring configured to be insertable through the outlet end of the cylindrical tube abutting the permeable carrier and to be tensioned directly against the inner wall of the cylindrical tube to securely hold the permeable carrier between same and the supporting shoulder.
Claim 2
Independent Claim
176 words
A device for the treatment of liquids, comprising a flowthrough vessel having an inlet and an outlet and containing therein a treatment agent between the inlet and the outlet, the flowthrough vessel comprising a substantially cylindrical tube having one end at the outlet and a conically widening tube section connected to the other end of said cylindrical tube and, integral therewith, a permeable carrier configured to be insertable into the cylindrical tube through the outlet end thereof for supporting thereupon the treatment agent within the cylindrical tube and means for maintaining the permeable carrier in position within the cylindrical tube, said means comprising a supporting shoulder extending radially inwardly from the inner wall of the cylindrical tube at the outlet end, wherein the permeable carrier, after insertion, rests against the shoulder and a holding ring configured to be insertable through the outlet end of the cylindrical tube abutting the permeable carrier and to be tensioned directly against the inner wall of the cylindrical tube to securely hold the permeable carrier between same and the supporting shoulder.
Claim 3
Dependent Claim
14 words
A device as claimed in claim 1 wherein the permeable carrier is a sieve.
Claim 4
Dependent Claim
15 words
A device as claimed in claim 2 wherein the carrier sieve is a glass frit.
Claim 5
Dependent Claim
17 words
A device as claimed in claim 2 wherein the carrier sieve consists of a synthetic resin fabric.
Claim 6
Dependent Claim
16 words
A device as claimed in claim 4 wherein the synthetic resin fabric is a polyamide fabric.
Claim 7
Dependent Claim
27 words
A device as claimed in claim 1 further comprising a second cylindrical tube connected at one end to the other end of the widened conical tube section.
Claim 8
Dependent Claim
17 words
A device as claimed in claim 1 wherein the flow-through vessel is composed of a transparent material.
Claim 9
Dependent Claim
15 words
A device as claimed in claim 1 wherein the transparent material is a synthetic resin.
Claim 10
Dependent Claim
15 words
A device as claimed in claim 1 wherein the holding ring comprises a spring ring.
Claim 11
Independent Claim
142 words
A device for the treatment of liquids, comprising a flowthrough vessel having an inlet and an outlet and containing therein a treatment agent between the inlet and the outlet, the flowthrough vessel comprising a substantially cylindrical tube having one end at the outlet and a conically widening tube section connected to the other end of said cylindrical tube and integral therewith, bearing members disposed in the transitional region between the cylindrical tube and the conical tube section, on the outer side thereof for bearing on the upper edge of a collection vessel receptive of the cylindrical tube said bearing members comprising roof-shaped outwardly extending ribs, each of which forms, with the cylindrical tube and the conical section, an acute-angled triangular member, and having gable lines bridging the hollow throat in the transition region between the cylindrical tube and the conical tube section.
Claim 12
Independent Claim
142 words
A device for the treatment of liquids, comprising a flowthrough vessel having an inlet and an outlet and containing therein a treatment agent between the inlet and the outlet, the flowthrough vessel comprising a substantially cylindrical tube having one end at the outlet and a conically widening tube section connected to the other end of said cylindrical tube and integral therewith, bearing members disposed in the transitional region between the cylindrical tube and the conical tube section, on the outer side thereof for bearing on the upper edge of a collection vessel receptive of the cylindrical tube said bearing members comprising roof-shaped outwardly extending ribs, each of which forms, with the cylindrical tube and the conical section, an acute-angled triangular member, and having gable lines bridging the hollow throat in the transition region between the cylindrical tube and the conical tube section.
Claim 13
Dependent Claim
27 words
A device as claimed in claim 10 wherein the diameter of the cylindrical tube is configured to be introduced into the open end of a test tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |