US3830369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure gradient chamber for liquid chromatography
Assignee: Individual
•
Filing: 1973-12-11
•
Granted: 1974-08-20
•
Expires: 1993-12-11
Abstract
Abstract An element having a chamber therein is secured to a device which is provided with inlet and outlet passages communicating with the chamber. A stirrer is positioned in the chamber and serves to mix liquid within the chamber with a fluid introduced to the chamber under high pressure via the inlet passage, the resultant mix being forced out of the chamber through the outlet passage.
Inventors
- 👤 E Pfadenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:44
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/34; G01N30/04; G01N30/16; G01N30/22; G01N2030/347; G01N30/50; G01N30/56; G01N2030/562; G01N2030/565
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
A device for developing a high pressure gradient for liquid chromatography comprising: a cap; an element having a chamber therein; means for securing the element to said cap; inlet and outlet passages in said cap, said passages communicating with the chamber; and stirring means within said chamber for mixing fluid within the chamber with fluid introduced under pressure to the chamber through the inlet.
Claim 2
Independent Claim
64 words
A device for developing a high pressure gradient for liquid chromatography comprising: a cap; an element having a chamber therein; means for securing the element to said cap; inlet and outlet passages in said cap, said passages communicating with the chamber; and stirring means within said chamber for mixing fluid within the chamber with fluid introduced under pressure to the chamber through the inlet.
Claim 3
Dependent Claim
15 words
A device as set forth in claim 1, wherein said stirring means is magnetically operable.
Claim 4
Dependent Claim
20 words
A device as set forth in claim 1, wherein said cap includes a recess within which said element is secured.
Claim 5
Dependent Claim
30 words
A device as set forth in claim 3, wherein said securing means comprises a retainer operatively related to the recess and the element to hold said element within the recess.
Claim 6
Dependent Claim
34 words
A device as set forth in claim 3, further comprisiNg sealing means within said recess engaging the element and the cap to prevent escape of fluid from the chamber except through the outlet passage.
Claim 7
Dependent Claim
59 words
A device as set forth in claim 1, wherein said element is provided with a cylindrical cavity to define the chamber, the device further comprising a stem secured to said cap and projecting within the cavity, said stem having a passage therethrough communicating with the inlet passage to introduce the fluid under pressure to the interior of the chamber.
Claim 8
Dependent Claim
27 words
A device as set forth in claim 6, wherein said stirring means is located between the stem and the bottom of said cavity and is magnetically operable.
Claim 9
Dependent Claim
31 words
A device as set forth in claim 1, further comprising sealing means engaging the element and the cap to prevent escape of fluid from the chamber except through the outlet passage.
References Cited (Backward Citations)
US3504799A
Cited
US3583230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |