Patent US4288322A successfully refreshed from Google Patents.
US4288322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample/standard injection head for fluid-phase chromatograph
Assignee: Prolabo SA
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Filing: 1980-09-29
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Granted: 1981-09-08
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Expires: 2000-09-29
Abstract
Abstract An improved device/apparatus for sweeping and injecting a sample and at least one standard into the separation column of a fluid-phase chromatograph, including (i) means for securing same to the inlet of such separation column, (ii) a supply inlet for a stream of carrier medium and means for directing said stream to said separation column, (iii) dividing means in said device for dividing said stream into primary and secondary streams, (iv) distributing means for directing said primary stream to said separation column and distributing said primary stream over the inlet area of said column, (v) means for directing said secondary stream axially into said separation column inlet, and (vi) means for introducing a sample into said secondary stream, the improvement which comprises (vii) means for introducing at least one standard also into said secondary stream.
Inventors
- 👤 Claude Guillemin
- 👤 Christian Mayen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:22
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N2030/204
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
In a device for sweeping and injecting a sample and at least one standard into the separation column of a fluid-phase chromatograph, including (i) means for securing same to the inlet of such separation column, (ii) a supply inlet for a stream of carrier medium and means for directing said stream to said separation column, (iii) dividing means in said device for dividing said stream into primary and secondary streams, (iv) distributing means for directing said primary stream to said separation column and distributing said primary stream over the entire inlet area of said column, (v) means for directing said secondary stream axially into said separation column inlet, and (vi) means for introducing a sample into said secondary stream, the improvement which comprises (vii) means for introducing at least one standard also into said secondary stream.
Claim 2
Dependent Claim
136 words
In a device for sweeping and injecting a sample and at least one standard into the separation column of a fluid-phase chromatograph, including (i) means for securing same to the inlet of such separation column, (ii) a supply inlet for a stream of carrier medium and means for directing said stream to said separation column, (iii) dividing means in said device for dividing said stream into primary and secondary streams, (iv) distributing means for directing said primary stream to said separation column and distributing said primary stream over the entire inlet area of said column, (v) means for directing said secondary stream axially into said separation column inlet, and (vi) means for introducing a sample into said secondary stream, the improvement which comprises (vii) means for introducing at least one standard also into said secondary stream.
Claim 3
Dependent Claim
21 words
The device as defined by claim 1, wherein said dividing means include primary and secondary conduits communicating with said supply inlet.
Claim 4
Dependent Claim
24 words
The device as defined by claim 2, said means (vii) for introducing at least one standard into said secondary stream comprising a piston valve.
Claim 5
Dependent Claim
18 words
The device as defined by claim 2, said means (vi) and (vii) each comprising a single piston valve.
Claim 6
Dependent Claim
24 words
The device as defined by claim 2, said means (vii) for introducing at least one standard into said secondary stream comprising a rotary valve.
Claim 7
Dependent Claim
24 words
The device as defined by claim 2, said means (vii) for introducing at least one standard into said secondary stream comprising a barrel valve.
Claim 8
Dependent Claim
25 words
The device as defined by claim 2, the same comprising a serially, fixedly assembled array of block housing members including said means (i) to (vii).
Claim 9
Dependent Claim
120 words
The device as defined by claim 7, the same consecutively comprising (a) a first block including a supply inlet opening for the supply of the stream of the carrier fluid and means to divide the stream of said carrier fluid into a primary stream and a secondary stream, (b) a second block including means for introduction of a standard into said secondary stream, (c) a third block including means for introduction of a sample into said secondary stream, and (d) a fourth block including means for the securing/mounting thereof to the block housing the separation column, and means for directing the primary stream to said separation column and distributing said primary stream over the entire inlet area of said column.
Claim 10
Dependent Claim
16 words
The device as defined by claim 8, further comprising a sealing gasket interposed between adjacent blocks.
Claim 11
Dependent Claim
14 words
The device as defined by claim 9, said sealing gasket being made of polytetrafluoroethylene.
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) | 1984-09-07 | 1985-03-09 | 1985-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-07 | 1989-03-09 | 1989-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-07 | 1993-03-09 | 1993-09-08 | $7700.00 | Window Closed / Lapsed |