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US4379775A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for thermochemical quantitative analysis

Assignee: Vysoke Udeni Technicke
•
Filing: 1980-10-15
•
Granted: 1983-04-12
•
Expires: 2000-10-15
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Abstract

Abstract A general-purpose apparatus for thermochemical quantitative analysis, operable upon the principle of measuring temperature variations accompanying chemical reactions between a solid and a liquid substance as well as between two solutions. An exchangeable reaction vessel made of formed polystro in Dewar vessel is received in a heat-insulated receptacle with a thermostat controlled bath, the reaction vessel being provided with a cover having an opening for a removable lid which supports a temperature sensor and a stirring rod. The removable lid has openings to receive a dose feeder for a solid specimen and/or a dose feeder for reagent solutions. Due to the equalizing of the temperature values of reagents, specimens to be analyzed, as well as the entire apparatus to a constant temperature in a thermostatically controlled bath, the apparatus according to the present invention makes it possible considerably to raise the degree of accuracy of thermochemical analysis, and to carry out a complex analysis of a single solid specimen in one solution.

Inventors

  • 👤 Jiri Brandstetr
  • 👤 Josef Huleja
  • 👤 Josef Kupec

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 19:08
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; G01N25/4846

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 115 words
An apparatus for thermochemical quantitative analysis, comprising a heat-insulated receptacle with a thermostatically controlled liquid bath, a removable part and a hinged part, the receptacle containing a Dewar vessel in which there is an exchangable reaction vessel, the receptacle further containing at least one stock bottle and at least one volumetric flask which are disposed below the hinged part of the lid and contain a solution to be analyzed and a reagent solution, respectively, the removable part of the lid which has the air-filled insulating space being retained by gravity above said reaction vessel and being provided with apertures for at least one liquid reagent dose feeder and a dose feeder for a solid sample.
Claim 2
Independent Claim 115 words
An apparatus for thermochemical quantitative analysis, comprising a heat-insulated receptacle with a thermostatically controlled liquid bath, a removable part and a hinged part, the receptacle containing a Dewar vessel in which there is an exchangable reaction vessel, the receptacle further containing at least one stock bottle and at least one volumetric flask which are disposed below the hinged part of the lid and contain a solution to be analyzed and a reagent solution, respectively, the removable part of the lid which has the air-filled insulating space being retained by gravity above said reaction vessel and being provided with apertures for at least one liquid reagent dose feeder and a dose feeder for a solid sample.
Claim 3
Dependent Claim 17 words
An apparatus as claimed in claim 1, wherein the exchangeable reaction vessel is made of foamed polystyrene.
Claim 4
Dependent Claim 56 words
An apparatus as claimed in claim 1, wherein the solid specimen dose feeder is a cylindrical container closed at its lower end by a plug for retaining a solid specimen, the container receiving a piston rod with a piston for discharging the solid specimen together with the plug out of the container into said reaction vessel.
Claim 5
Dependent Claim 89 words
An apparatus as claimed in claim 1, wherein the liquid specimen dose feeder is a flask made of thermoplastic material, said flask having a neck for passing a vertically displaceable U-shaped pipe extending by one of its ends to an arbitrary depth down into said flask, while the other end of the pipe is disposed at the bottom of the stock bottle in a water bath, said stock bottle containing a reagent solution, said bottle being provided with a pipe adapted to be connected to a superatmospheric pressure source.

References Cited (Backward Citations)

US3210996A Cited
US3646812A Cited
US3607089A Cited
US4152117A Cited
US4130016A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-04-11 1986-10-11 1987-04-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-04-11 1990-10-11 1991-04-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-04-11 1994-10-11 1995-04-12 $7700.00 Window Closed / Lapsed

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