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US3759374A
Expired / Lapsed
US
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Cuvette
Assignee: Merck Patent GmbH
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Filing: 1970-06-30
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Granted: 1973-09-18
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Expires: 1990-06-30
Abstract
Abstract Disposable cuvettes with square apertures which serve both as a container for reagents used in analytical determinations and for conducting photometric determinations therein are economically sealed by bonding a film or foil to the upper edges of the cuvettes which define their aperture and thereafter separating the sealed cuvettes thus joined together by severing the film or foil along lines defined by their side walls.
Inventors
- 👤 R Helger
- 👤 W Baumer
- 👤 A Hartel
- 👤 A Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:41
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/5302; G01N33/5304; G01N21/00; G01N21/01; G01N21/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
A sealed cuvette having a rectangular or square basal surface and side walls whose inner surfaces form a truncated pyramid having a side wall inclination of 0*-5* and whose upper edges form a rectangular or square aparature corresponding in dimensions to the inner cross section of the cuvette and whose side walls have a recessed outer face at their upper end which forms a shoulder in said side walls extending to their upper edge, formed of a transparent and dimensionally stable plastic wHich is light-permeable in at least a portion of the wavelength range from 200-800 nanometers and adapted for string solids and liquids and for the optical measurement of analytical samples, said aperture being sealed by a foil or film bonded to said upper edge of said side walls.
Claim 2
Dependent Claim
130 words
A sealed cuvette having a rectangular or square basal surface and side walls whose inner surfaces form a truncated pyramid having a side wall inclination of 0*-5* and whose upper edges form a rectangular or square aparature corresponding in dimensions to the inner cross section of the cuvette and whose side walls have a recessed outer face at their upper end which forms a shoulder in said side walls extending to their upper edge, formed of a transparent and dimensionally stable plastic wHich is light-permeable in at least a portion of the wavelength range from 200-800 nanometers and adapted for string solids and liquids and for the optical measurement of analytical samples, said aperture being sealed by a foil or film bonded to said upper edge of said side walls.
Claim 3
Dependent Claim
9 words
A cuvette according to claim 1, formed of polystyrene.
Claim 4
Dependent Claim
10 words
A cuvette according to claim 1, formed of polymethyl methacrylate.
Claim 5
Dependent Claim
13 words
A cuvette according to claim 1, whose aperture is sealed with aluminum foil.
Claim 6
Dependent Claim
18 words
A cuvette according to claim 1 wherein said foil or film bears identifying indicia on its outer surface.
Claim 7
Dependent Claim
13 words
A cuvette according to claim 5 whose aperture is sealed with aluminum foil.
Claim 8
Dependent Claim
28 words
A plurality of cuvettes according to claim 1 whose side walls are in face-to-face contact and which are joined together by the film or foil sealing their aperture.
Claim 9
Dependent Claim
18 words
A cuvette according to claim 7 wherein said foil or film bears identifying indicia on its outer surface.
Claim 10
Dependent Claim
13 words
A cuvette according to claim 2 whose aperture is sealed with aluminum foil.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |