US3879983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential scanning calorimeter for thermal analysis of liquids
Assignee: Individual
•
Filing: 1973-04-11
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Granted: 1975-04-29
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Expires: 1993-04-11
Abstract
Abstract A differential scanning calorimeter for thermal analysis of liquids, wherein the adiabatizing shell is made up by a pair of identical surfaces of revolution. Each one of these surfaces of revolution includes a convex portion adjoining a flat annular portion having grooves cut therein. The two surfaces of revolution are pressed together by their respective flat annular portions, so that their convex portions define jointly a closed spaced wherein the calorimetric cell is positioned, at least portions of capillary inlet and outlet passages of this calorimetric cell being defined by the grooves of the pressed together flat annular portions of the surfaces of revolution.
Inventors
- 👤 Petr Leonidovich Privalov
- 👤 Valerian Valerievich Plotnikov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:02
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; G01N25/4846; G01N25/4866
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
198 words
A differential scanning calorimeter for thermal analysis of liquids, comprising: an adiabatizing shell, said adiabatizing shell including two identical surfaces of revolution, each said surface of revolution incorporating a convex portion adjoining a flat annular portion, said flat annular portion of each said surface of revolution having grooves, said two identical surfaces of revolution being firmly pressed together by said flat annular portions thereof, so that said convex portions thereof define together a closed space; heating means associated with said adiabatizing shell; a temperature regulator electrically connected with said heating means associated with said adiabatizing shell a calorimetric cell disposed within said closed space; a first calorimetric chamber in said calorimetric cell; a second calorimetric chamber in said calorimetric cell; first capillary passage means for letting a liquid being investigated into and out of said first calorimetric chamber; second capillary passage means for letting a reference liquid into and out of said second calorimetric chamber; a portion of said first and second capillary passage means being defined by said grooves of said respective pressed together flat annular portions; heating means associated with said calorimetric cell; and a differential temperature responsive member encircling said first and second calorimetric chambers.
Claim 2
Dependent Claim
198 words
A differential scanning calorimeter for thermal analysis of liquids, comprising: an adiabatizing shell, said adiabatizing shell including two identical surfaces of revolution, each said surface of revolution incorporating a convex portion adjoining a flat annular portion, said flat annular portion of each said surface of revolution having grooves, said two identical surfaces of revolution being firmly pressed together by said flat annular portions thereof, so that said convex portions thereof define together a closed space; heating means associated with said adiabatizing shell; a temperature regulator electrically connected with said heating means associated with said adiabatizing shell a calorimetric cell disposed within said closed space; a first calorimetric chamber in said calorimetric cell; a second calorimetric chamber in said calorimetric cell; first capillary passage means for letting a liquid being investigated into and out of said first calorimetric chamber; second capillary passage means for letting a reference liquid into and out of said second calorimetric chamber; a portion of said first and second capillary passage means being defined by said grooves of said respective pressed together flat annular portions; heating means associated with said calorimetric cell; and a differential temperature responsive member encircling said first and second calorimetric chambers.
Claim 3
Dependent Claim
44 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 1, wherein said calorimetric cell is positioned within said adiabatizing shell so that the centre of symmetry of said calorimetric cell coincides with the centre of symmetry of said adiabatizing shell.
Claim 4
Dependent Claim
67 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 2, comprising at least one auxiliary adiabatizing shell similar to said main adiabatizing shell, said auxiliary adiabatizing shell enclosing therein said main adiabatizing shell with said calorimetric cell received therein; heating means associated with said auxiliary adiabatizing shell; an independent temperature regulator electrically connected with said heating means associated with said auxiliary adiabatizing shell.
Claim 5
Dependent Claim
26 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 3, wherein said auxiliary adiabatizing shell is spaced from said main adiabatizing shell.
Claim 6
Dependent Claim
52 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 3, wherein said auxiliary adiabatizing shell is so positioned relative to said main adiabatizing shell that the respective centres of symmetry of said shells coincide and said respective flat annular portions of said shells extend in the same plane.
Claim 7
Dependent Claim
26 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 5, wherein said auxiliary adiabatizing shell is spaced from said main adiabatizing shell.
Claim 8
Dependent Claim
67 words
A differential scanning calorimeter for thermal analysis of liquids in accorodance with claim 1, comprising at least one auxiliary adiabatizing shell similar to said main adiabatizing shell, said auxiliary adiabatizing shell enclosing therein said main adiabatizing shell with said calorimetric cell received therein; heating means associated with said auxiliary adiabatizing shell; an independent temperature regulator electrically connected with said heating means associated with said auxiliary adiabatizing shell.
Claim 9
Dependent Claim
52 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 7, wherein said auxiliary adiabatizing shell Is so positioned relative to said main adiabatizing shell that the respective centres of symmetry of said shells coincide and said respective flat annular portions of said shells extend in the same plane.
Claim 10
Dependent Claim
25 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 8, wherein said auxiliary adiabatizing shell is spaced from said adiabatizing shell.
Claim 11
Dependent Claim
26 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 7, wherein said auxiliary adiabatizing shell is spaced from said main adiabatizing shell.
Claim 12
Dependent Claim
38 words
A differential scanning colorimeter for thermal analysis of liquids in accordance with claim 1, wherein said respective convex portions of said surfaces of revolution, belonging to said main and auxiliary adiabatizing shells, are each shaped as a semi-sphere.
Claim 13
Dependent Claim
41 words
A differential scanning calorimeter for thermal analysis of liquids in accordance with claim 1, wherein said respective heating means associated with said main and auxiliary adiabatizing shells are uniformly distributed over the external surfaces of the respective ones of said shells.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |