Patent US2969362A successfully refreshed from Google Patents.
Patent US4059523A successfully refreshed from Google Patents.
US4059523A
Expired / Lapsed
US
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Column for use in high speed liquid chromatography
Assignee: Jasco Corp
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Filing: 1976-09-23
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Granted: 1977-11-22
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Expires: 1996-09-23
Abstract
Abstract A column used for high speed liquid chromatography which is characterized in (a) eminent separating ability suitable for microanalysis while having a small internal diameter, (b) minimizing the separation impediment due to minute flaws, tiny recesses or the like on the inner surface thereof, and (c) facilitating packing operation of particulate packing or support material thereinto, by enabling the material to closely contact not only with each other but also with the inner surface of the column that can yield to a necessary extent.
Inventors
- 👤 Koichi Mochizuki
- 👤 Shigeho Hiragaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/50; G01N30/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A column for use in high speed liquid chromatography which is constructed by closely packing a solid phase in a hollow tubular body, said column comprising: a solid phase wherein the composing solid particles, having a substantially uniform particle size of a sphere having a diameter less than 0.10 mm, are packed in said tubular body in close contact relationship with each other; and a tubular body having an inner diameter less than 1.0 mm, which is made of fluoro-carbon resin, and which is deformed to be adapted to the particles located at the radially outermost position, for permiting all of the particles confronting with the inner surface thereof to closely contact therewith, substantially leaving no void spaces therebetween.
Claim 2
Dependent Claim
119 words
A column for use in high speed liquid chromatography which is constructed by closely packing a solid phase in a hollow tubular body, said column comprising: a solid phase wherein the composing solid particles, having a substantially uniform particle size of a sphere having a diameter less than 0.10 mm, are packed in said tubular body in close contact relationship with each other; and a tubular body having an inner diameter less than 1.0 mm, which is made of fluoro-carbon resin, and which is deformed to be adapted to the particles located at the radially outermost position, for permiting all of the particles confronting with the inner surface thereof to closely contact therewith, substantially leaving no void spaces therebetween.
Claim 3
Dependent Claim
24 words
A column for use in high speed liquid chromatography as set forth in claim 1, wherein said hollow tubular body is composed of polytrifluorochloroethylene.
Claim 4
Dependent Claim
29 words
A column for use in high speed liquid chromatography as set forth in claim 1, wherein said hollow tubular body is provided with an external tube of stainless steel.
Claim 5
Dependent Claim
29 words
A column for use in high speed liquid chromatography as set forth in claim 2, wherein said hollow tubular body is provided with an external tube of stainless steel.
Claim 6
Dependent Claim
36 words
A column for use in high speed liquid chromatography as set forth in claim 1, wherein said spherical particles are arranged in multi-layers radially extending, in a fashion that every other layer is repeatedly the same.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |