Patent US3620947A successfully refreshed from Google Patents.
US3620947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophoretic system
Assignee: EG&G Instruments Inc
•
Filing: 1969-04-10
•
Granted: 1971-11-16
•
Expires: 1989-04-10
Abstract
Abstract An electrophoretic system for concentrating and separating charged particles and for improving the resolution of the separated particle laminae that utilizes a buffer composition which will provide a ratio of leading-trailing ion boundary to the fastest particle mobility that approaches unity, during the period of free electrophoresis.
Inventors
- 👤 Robert Carter Allen
- 👤 Dorothy J Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44756
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
The process of claim 1 further comprising: providing a single gel zone between the particle solution and the buffer solution; lowering the conductance of both the single gel zone and particle solution to raise the voltage gradient appearing thereacross; and maintaining all gel zones, the particle solution and buffer solution at the same pH.
Claim 2
Dependent Claim
21 words
The process of claim 2 wherein the buffer solution is a member of the group consisting of citrate-borate, sulfate-borate and chloride-borate.
Claim 3
Dependent Claim
11 words
The process of claim 3 wherein the buffer solution is citratE-borate.
Claim 4
Dependent Claim
11 words
The process of claim 3 wherein the buffer solution is sulfate-borate.
Claim 5
Dependent Claim
11 words
The process of claim 3 wherein the buffer solution is chloride-borate.
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) | 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 |