US3635808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for forming electrophoresis apparatus and the like
Assignee: FRANKLIN R ELEVITCH
•
Filing: 1969-11-17
•
Granted: 1972-01-18
•
Expires: 1989-11-17
Abstract
Abstract Thin film apparatus for electrophoresis, chemical analyses and the like is provided, the film being an aqueous gel such as agarose gel. Improvements in the manufacture of such apparatus are provided such as the use of paraffin wax on the cover part of the apparatus to facilitate separation of the film of gel from the cover. Also continuous and semicontinuous methods of production are provided.
Inventors
- 👤 Franklin R Elevitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:31
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/505; B01L3/54; B01L3/545; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44717; G01N27/44721; G01N27/44747; G01N27/44756
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
12 words
The method of claim 1 wherein said hydrocarbon material is paraffin wax.
Claim 2
Dependent Claim
29 words
The method of claim 2 wherein said cover is formed on its contacting surface with well-forming projections that project into the layer of gel and form sample-receiving wells therein.
Claim 3
Dependent Claim
18 words
The method of claim 2 wherein said layer of gel does not exceed about 1 millimeter in thickness.
Claim 4
Dependent Claim
17 words
The method of claim 2 wherein the paraffin wax is applied in solution in a volatile solvent.
Claim 5
Dependent Claim
18 words
ThE method of claim 5 wherein the applied coating of wax, after evaporation of solvent, is heat glazed.
Claim 6
Dependent Claim
75 words
Apparatus adapted for gel diffusion analysis such as electrophoresis comprising: a. an impermeable base member, b. a layer of permeable gel having a surface in adherent contact with said base member, c. a cover member with an inner surface uniformly coated with a solid thermoplastic, essentially hydrocarbon, hydrophobic material to which the gel is nonadherent, the coated inner surface of said cover member being in contact with the other surface of said layer of gel.
Claim 7
Dependent Claim
12 words
The apparatus of claim 7 wherein such coating material is paraffin wax.
Claim 8
Dependent Claim
23 words
The apparatus of claim 8 wherein said cover member is formed with well-forming projections which project into the gel to form sample-receiving wells.
Claim 9
Dependent Claim
18 words
The apparatus of claim 8 wherein said layer of gel does not exceed about 1 millimeter in thickness.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |