US3245207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic column
Assignee: University of California Berkeley
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Filing: 1961-10-23
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Granted: 1966-04-12
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Expires: 1981-10-23
Abstract
No abstract record available.
Inventors
- 👤 Alfred W Wilson
- 👤 Ernest W Burton
- 👤 John D Goeschl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6052; G01N30/606
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A CHROMATOGRAPHIC COLUMN WHICH COMPRISES: (A) AN INNER MEMBER HAVING AN OUTER SURFACE DEFINING A FRUSTUM OF A CONE AND A HELICAL GROOVE; (B) AN OUTER MEMBER HAVING AN INNER SURFACE DEFINING A FRUSTUM OF A CONE SIMILAR TO SAID FRUSTUM DEFINED BY SAID OUTER SURFACE OF SAID INNER MEMBER; (C) A VALVE MEMBER; (D) INLET MEANS COMMUNICATING WITH SAID VALVE MEMBER, (E) OUTLET MEANS SPACED FROM SAID INLET MEANS COMMUNICATING WITH SAID HELICAL GROOVE, AND (F) MEANS FOR SELECTIVELY CONNECTING VARIOUS LENGTHS OF SAID HELICAL GROOVE TO SAID VALVE MEMBER.
Claim 2
Dependent Claim
91 words
A CHROMATOGRAPHIC COLUMN WHICH COMPRISES: (A) AN INNER MEMBER HAVING AN OUTER SURFACE DEFINING A FRUSTUM OF A CONE AND A HELICAL GROOVE; (B) AN OUTER MEMBER HAVING AN INNER SURFACE DEFINING A FRUSTUM OF A CONE SIMILAR TO SAID FRUSTUM DEFINED BY SAID OUTER SURFACE OF SAID INNER MEMBER; (C) A VALVE MEMBER; (D) INLET MEANS COMMUNICATING WITH SAID VALVE MEMBER, (E) OUTLET MEANS SPACED FROM SAID INLET MEANS COMMUNICATING WITH SAID HELICAL GROOVE, AND (F) MEANS FOR SELECTIVELY CONNECTING VARIOUS LENGTHS OF SAID HELICAL GROOVE TO SAID VALVE MEMBER.
References Cited (Backward Citations)
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US3016107A
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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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |