US4101275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic photometric analyzer
Assignee: Nippon Steel Corp
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Filing: 1976-07-23
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Granted: 1978-07-18
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Expires: 1996-07-23
Abstract
Abstract In an automatic photometric analyzer, an injector and a coloring source deliver a respective sample solution and a coloring solution to a reactor to form a reactant. The reactant is circulated through an absorbency-measuring photometric device and back to the reactor.
Inventors
- 👤 Isamu Taguchi
- 👤 Akihiro Ono
- 👤 Ryutaro Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:47
CPC Classifications
G; G01; G01N; G01N35/00; G01N2035/00346; G01N2035/00435; Y; Y10; Y10S; Y10S436/00; Y10S436/824; Y10T; Y10T436/00; Y10T436/11; Y10T436/115831; Y10T436/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A photometric batch type analysis method, comprising, feeding a sample solution and a coloring solution to a reactor form a reaction product, then feeding said reaction product to a recirculation system in which the reaction product is expanded to eliminate bubbles, measuring its absorbency and forcing the reaction product back into the reactor by air pressure, removing the reaction product from said recirculation system after its absorbency has been measured a selected number of times.
Claim 2
Dependent Claim
75 words
A photometric batch type analysis method, comprising, feeding a sample solution and a coloring solution to a reactor form a reaction product, then feeding said reaction product to a recirculation system in which the reaction product is expanded to eliminate bubbles, measuring its absorbency and forcing the reaction product back into the reactor by air pressure, removing the reaction product from said recirculation system after its absorbency has been measured a selected number of times.
Claim 3
Dependent Claim
17 words
A method as set forth in claim 1, comprising controlling the temperature of the circulating reaction product.
Claim 4
Dependent Claim
14 words
A method as set forth in claim 2, comprising heating the circulating reaction product.
Claim 5
Dependent Claim
34 words
A method as set forth in claim 1, comprising an automatic exchanger from which sample solutions are supplied, injecting said sample solution from said exchanger to said reactor, said injector step being automatically controlled.
Claim 6
Dependent Claim
34 words
A method as set forth in claim 1, wherein bubbles are formed in the reaction product when the reaction product is circulated and comprising the step of eliminating said bubbles from said reaction product.
Claim 7
Dependent Claim
17 words
A method as set forth in claim 4, comprising controlling the temerature of the circulating reaction product.
Claim 8
Dependent Claim
14 words
A method as set forth in claim 1, comprising heating the circulating reaction product.
Claim 9
Dependent Claim
16 words
A method as set forth in claim 1, comprising recording the analysis of the reaction product.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |