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US4605536A
Expired / Lapsed
US
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Cuvette for projection display of chemical experiments
Assignee: Metaplast Quedlinburg Veb
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Filing: 1984-05-29
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Granted: 1986-08-12
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Expires: 2004-05-29
Abstract
Abstract A cuvette for the projection display of chemical experiments comprises a rectangular parallelopipedal block of transparent material, e.g. glass or a transparent synthetic resin, which is formed with one or more compartments having the shapes of chemical experiment vessels and in requisite passages communicating therewith so that complete chemical experiments can be carried out within the vessels and demonstrated by projection display.
Inventors
- 👤 Rudi Kuhnert
- 👤 Wolf-Dieter Legall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:05
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/24; B; B01; B01L; B01L3/00; B01L3/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
149 words
A cuvette for demonstrating chemical experiments which comprises an elongated rectanguler parallelopipedal block of transparent material formed unitarily with plane-parallel broad surfaces transluminable for projection display and with parallel upper and lower surfaces, said block being formed between said broad surfaces with a plurality of upright vertically elongated compartments, at least one of which is upwardly open of the shape of chemical experiment vessels, spaced apart in said block, means defining in the material of said block at least one elongate passage communicating between said compartments and terminating in lateral or bottom walls of said compartments at opposite ends at respective ones of said compartments, the walls of said compartments and said passage being defined exclusively by said material unitarily with said block, and means on said block for inducing a chemical reaction in at least one of said compartments, all of said compartments opening at said upper surface.
Claim 2
Dependent Claim
149 words
A cuvette for demonstrating chemical experiments which comprises an elongated rectanguler parallelopipedal block of transparent material formed unitarily with plane-parallel broad surfaces transluminable for projection display and with parallel upper and lower surfaces, said block being formed between said broad surfaces with a plurality of upright vertically elongated compartments, at least one of which is upwardly open of the shape of chemical experiment vessels, spaced apart in said block, means defining in the material of said block at least one elongate passage communicating between said compartments and terminating in lateral or bottom walls of said compartments at opposite ends at respective ones of said compartments, the walls of said compartments and said passage being defined exclusively by said material unitarily with said block, and means on said block for inducing a chemical reaction in at least one of said compartments, all of said compartments opening at said upper surface.
Claim 3
Dependent Claim
28 words
The cuvette defined in claim 1 wherein at least one of said compartments is provided with a further passage formed in said block and constituting a sidearm thereof.
Claim 4
Dependent Claim
14 words
The cuvette defined in claim 1 wherein said passage has generally a Z shape.
Claim 5
Dependent Claim
16 words
The cuvette defined in claim 1 wherein said passage has an undulating configuration within said block.
Claim 6
Dependent Claim
48 words
The cuvette defined in claim 1 wherein said block is formed with a cutout separating two portions, said compartment being in one of said portions, the other of said portions being provided with another compartment, further comprising means bridging said cutout between said portions to interconnect said compartments.
Claim 7
Dependent Claim
27 words
The cuvette defined in claim 5 wherein said block has a maximum thickness of about 20 mm and is composed of glass or a transparent synthetic resin.
Claim 8
Dependent Claim
18 words
The cuvette defined in claim 5 wherein said means includes a combustion tube which can be externally heated.
Claim 9
Dependent Claim
27 words
The cuvette defined in claim 7 wherein said block has a maximum thickness of about 20 mm and is composed of glass or a transparent synthetic resin.
Claim 10
Dependent Claim
16 words
The cuvette defined in claim 1 wherein said compartment has a shape of a test tube.
Claim 11
Dependent Claim
27 words
The cuvette defined in claim 9 wherein said block has a maximum thickness of about 20 mm and is composed of glass or a transparent synthetic resin.
Claim 12
Dependent Claim
21 words
The cuvette defined in claim 1 wherein said compartment has a shape of a round bottom flask with a narrow neck.
Claim 13
Dependent Claim
27 words
The cuvette defined in claim 11 wherein said block has a maximum thickness of about 20 mm and is composed of glass or a transparent synthetic resin.
Claim 14
Dependent Claim
40 words
The cuvette defined in claim 1 wherein said compartment forms a reservoir for a liquid and is provided with an opening at its bottom for discharging gas into a vessel inserted into said compartment and forming a liquid trap therein.
Claim 15
Dependent Claim
27 words
The cuvette defined in claim 13 wherein said block has a maximum thickness of about 20 mm and is composed of glass or a transparent synthetic resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |