US3620958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for electrophoretic analysis using a capillary tube with detection means
Assignee: US Philips Corp
•
Filing: 1969-09-29
•
Granted: 1971-11-16
•
Expires: 1989-09-29
Abstract
Abstract Cathode and anode containers are connected by a capillary measuring tube which has a detection electrode formed by a photoconducting material on or in the capillary measuring tube.
Inventors
- 👤 Popko Reinder Dijksterhuis
- 👤 Robert Rust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717; G01N27/4473; G01R; G01R19/00; G01R19/0084
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
A device as claimed in claim 1, characterized in that the wall of the capillary measuring tube comprises a nonphotoconducting material having a specific electric resistance of 1061012 ohm cm.
Claim 2
Dependent Claim
30 words
A device as claimed in claim 2, characterized in that the photoconducting material is provided in the form of a coating on the outer side of the capillary measuring tube.
Claim 3
Dependent Claim
26 words
A device as claimed in claim 3, characterized in that a coating of a transparent, electrically conducting material is provided on the coating comprising photoconducting material.
Claim 4
Dependent Claim
15 words
A device as claimed in claim 2, characterized in that the photoconducting material comprises selenium.
Claim 5
Dependent Claim
17 words
A device as claimed in claim 2, characterized in that the photoconducting material comprises a cadmium chalcogenide.
Claim 6
Dependent Claim
19 words
A device as claimed in claim 2, characterized in that the photoconducting material comprises a photoconducting synthetic plastic material.
Claim 7
Dependent Claim
19 words
A device as claimed in claim 7, characterized in that the photoconducting synthetic plastic material is a polyvinyl carbazole.
Claim 8
Dependent Claim
44 words
A device as claimed in claim 1, characterized in that it comprises means to throw a beam of light onto the photoconducting material, the diameter of said beam being smaller than or equal to the thickness of the wall of the capillary measuring tube.
Claim 9
Dependent Claim
46 words
A device as claimed in claim 9, characterized in that it comprises optical means to converge the beam of light used during measurement in such a manner that a substantially punctiform image is obtained on the outer side of the wall of the capillary measuring tube.
Claim 10
Dependent Claim
32 words
A device as claimed in claim 1, characterized in that the wall of the capillary measuring tube comprises photoconducting material having a specific resistance of 106-1012 ohm cm. in the exposed condition.
Claim 11
Dependent Claim
28 words
A device as claimed in claim 11, characterized in that a coating of a transparent, electrically conducting material is provided on the wall of the capillary measuring tube.
Claim 12
Dependent Claim
23 words
A device as claimed in claim 11, characterized in that the wall of the capillary measuring tube comprises a photoconducting synthetic plastic material.
Claim 13
Dependent Claim
21 words
A device as claimed in claim 13, characterized in that a polyvinyl carbazole is used as a photoconducting synthetic plastic material.
Claim 14
Dependent Claim
46 words
A device as claimed in claim 11, characterized in that it comprises optical means to converge the beam of light used during measurement in such a manner that a substantially punctiform image is obtained on the inner side of the wall of the capillary measuring tube.
References Cited (Backward Citations)
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Cited
US2711379A
Cited
US2989457A
Cited
US3025224A
Cited
US3453200A
Cited
US3492396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |