Patent US3763879A successfully refreshed from Google Patents.
US3763879A
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Combination column
Assignee: Roche Diagnostics GmbH
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Filing: 1971-02-18
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Granted: 1973-10-09
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Expires: 1991-02-18
Abstract
Abstract Combination columns comprised of individual connective parts, some of which may contain sieve means and other means, provide flexible and adaptive systems for effecting chemical processes such as column chromatography and involving carrier-bound reagents.
Inventors
- 👤 D Jaworek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; B01L3/56; B01L3/569; G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6052; G01N30/606; G01N30/84; G01N2030/8429; G01N30/26; G01N30/38; G01N30/46; G01N30/461; G01N30/50; G01N30/58; G01N30/6004; G01N30/6026; G01N30/6034; G01N30/6069; G01N30/6082; Y; Y10; Y10T; Y10T137/00; Y10T137/4891; Y10T137/794; Y10T137/8122
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
Combination column for effecting chemical processes comprising at least one hollow cylindrical column segment with threads on both ends, at least one hollow cylindrical threaded separating piece containing sieve means transversely disposed at one end thereof and at least one threaded end piece, the said segments and pieces having a common axis and being of substantially the same internal diameter and being screwed together in desired combination.
Claim 2
Dependent Claim
67 words
Combination column for effecting chemical processes comprising at least one hollow cylindrical column segment with threads on both ends, at least one hollow cylindrical threaded separating piece containing sieve means transversely disposed at one end thereof and at least one threaded end piece, the said segments and pieces having a common axis and being of substantially the same internal diameter and being screwed together in desired combination.
Claim 3
Dependent Claim
31 words
Column as claimed in claim 1 wherein there is more than one of said column segments and these column segments are of different length in defined length relationship to each other.
Claim 4
Dependent Claim
30 words
Column as claimed in claim 1 wherein said sieve means in said cylindrical separating piece lies substantially in the same plane as one of the ends of said separation piece.
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |