US4204769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cuvette for flameless atom absorption spectroscopy
Assignee: US Philips Corp
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Filing: 1978-01-17
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Granted: 1980-05-27
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Expires: 1998-01-17
Abstract
Abstract Cuvettes of carbonized laminated fabric with a surface layer of pyrolytic graphite are easy to manufacture, have a high mechanical rigidity and no memory effect and enable the operation of analysis apparatuses at normal mains voltage (220 V).
Inventors
- 👤 Bernhard Lersmacher
- 👤 Hans Lydtin
- 👤 Karlheinz Schelhas
- 👤 Wilhelmus F. Knippenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:22
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83; C04B35/515; C04B35/52; C04B35/524; G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/74
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
43 words
A cuvette for flameless atom absorption spectroscopy comprising a cuvette basic body member being formed of a carbonized laminated fabric including cotton fabric and at least one of phenol resin or cresol resin, and a carbon layer formed on said basic body member.
Claim 2
Dependent Claim
43 words
A cuvette for flameless atom absorption spectroscopy comprising a cuvette basic body member being formed of a carbonized laminated fabric including cotton fabric and at least one of phenol resin or cresol resin, and a carbon layer formed on said basic body member.
Claim 3
Dependent Claim
14 words
A cuvette as claimed in claim 1, wherein said carbon layer is pyrolytic graphite.
Claim 4
Dependent Claim
14 words
A cuvette as claimed in claim 1, wherein said carbon layer is glassy carbon.
Claim 5
Dependent Claim
36 words
A cuvette as claimed in claim 1, wherein said cuvette basic body member has a shape providing a temperature distribution between a probe contained in said cuvette body member and measuring apertures of said body member.
Claim 6
Dependent Claim
24 words
A cuvette as claimed in claim 4, wherein said temperature distribution has a maximum at said probe and a minimum at said measuring apertures.
Claim 7
Dependent Claim
30 words
A cuvette as clamed in claim 4, wherein said basic body member has a constriction at which said probe is disposed, and said measuring apertures are spaced from said constriction.
Claim 8
Dependent Claim
21 words
A cuvette as claimed in claim 6, wherein said basic body member is cylindrical and said constriction has an X-shaped cross-section.
Claim 9
Dependent Claim
21 words
A cuvette as claimed in claim 6, wherein said basic body member is cylindrical and said constriction has a H-shaped cross-section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |