US3889538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample vaporizer for gas chromatography
Assignee: Sunoco Inc R&M
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Filing: 1974-06-05
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Granted: 1975-06-17
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Expires: 1994-06-05
Abstract
Abstract A heated metal block has an L-shaped bore therein, into the corner of which extends a non-wettable tube which carries the liquid sample (drop) to be vaporized from a liquid sample valve. The drop exiting from the lower open end of the tube is instantaneously vaporized, and the carrier gas or eluting gas carries the vaporized sample out of the bore and toward a chromatographic column.
Inventors
- 👤 Alfred A Fingerle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; G01N1/00; G01N1/02; G01N1/22; G01N2030/126
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
An apparatus for introducing a small sample of a volatile liquid into a chromatographic carrier gas stream which comprises: a block of heat-conducting metal, said block having a continuous carrier-gas transmitting conduit extending through the interior thereof with an inlet end and an outlet end both opening into the outer surface of the block; heater means for heating said block to an elevated temperature with respect to the ambient, a sampleliquid transmitting conduit of oleophobic material extending through said conduit inlet end into communication with said continuous conduit at a point in the interior of said block, and means providing for connection of said conduit outlet end to a chromatographic column.
Claim 2
Independent Claim
111 words
An apparatus for introducing a small sample of a volatile liquid into a chromatographic carrier gas stream which comprises: a block of heat-conducting metal, said block having a continuous carrier-gas transmitting conduit extending through the interior thereof with an inlet end and an outlet end both opening into the outer surface of the block; heater means for heating said block to an elevated temperature with respect to the ambient, a sampleliquid transmitting conduit of oleophobic material extending through said conduit inlet end into communication with said continuous conduit at a point in the interior of said block, and means providing for connection of said conduit outlet end to a chromatographic column.
Claim 3
Dependent Claim
24 words
Apparatus according to claim 1, wherein said liquid transmitting conduit comprises a tube made from a material which is non-wettable by an oleaginous liquid.
Claim 4
Dependent Claim
13 words
Apparatus set forth in claim 2, wherein said material is a Teflon resin.
Claim 5
Dependent Claim
32 words
Apparatus set forth in claim 1, wherein said continuous conduit is substantially L-shaped, and wherein said liquid transmitting conduit communicates with said L-shaped conduit at a point immediately adjacent the corner thereof.
Claim 6
Dependent Claim
49 words
Apparatus set forth in claim 1, wherein said liquid transmitting conduit extends from a liquid sample valve to said point of communication; said apparatus including also a rigid tube closely surrounding a substantial portion of the length of said liquid transmitting conduit to provide mechanical support for such conduit.
Claim 7
Dependent Claim
19 words
Apparatus of claim 1, including also means for Feeding carrier gas into the inlet end of said continuous conduit.
Claim 8
Dependent Claim
32 words
Apparatus set forth in claim 6, wherein said continuous conduit is substantially L-shaped, and wherein said liquid transmitting conduit communicates with said L-shaped conduit at a point immediately adjacent the corner thereof.
Claim 9
Dependent Claim
24 words
Apparatus according to claim 7, wherein said liquid transmitting conduit comprises a tube made from a material which is non-wettable by an oleaginous liquid.
Claim 10
Dependent Claim
13 words
Apparatus set forth in claim 8, wherein said material is a Teflon resin.
Claim 11
Dependent Claim
49 words
Apparatus set forth in claim 8, wherein said liquid transmitting conduit extends from a liquid sample valve to said point of communication; said apparatus including also a rigid tube closely surrounding a substantial portion of the length of said liquid transmitting conduit to provide mechanical support for such conduit.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |