US4038146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determination of serum triglycerides and reagents
Assignee: Latron Laboratories Inc
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Filing: 1974-12-09
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Granted: 1977-07-26
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Expires: 1994-12-09
Abstract
Abstract A serum sample is added to a reaction liquid obtained by adding an aqueous solution of a mixture of a tetrazolium compound and phenazine methosulfate to an enzyme-coenzyme reagent comprising LPL, GDH and NAD thereby effecting hydrolysis reaction of serum triglycerides and subsequent dehydrogenation reaction of resulting glycerol and the liquid after the reaction is subjected to colorimetry in a visible ray region to determine the triglyceride content of the serum.
Inventors
- 👤 Urao Nonaka
- 👤 Hideto Shibata
- 👤 Nobuyuki Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:45
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/61; C12Q1/26; C12Q1/32; C12Q1/34; C12Q1/44; C12Q2326/00; C12Q2326/90; C12Q2326/92; G; G01; G01N; G01N2333/00; G01N2333/90; G01N2333/902; G01N2333/904; G01N2333/914; G01N2333/916; G01N2333/918; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
101 words
A method of determining serum triglycerides by hydrolysis according to an enzymatic reaction, wherein a serum is added to a reaction liquid obtained by adding an aqueous solution of a mixture of a tetrazolium compound and phenazine methosulfate to an enzyme-coenzyme reagent comprising lipoprotein lipase (LPL), glycerol dehydrogenase (GDH) obtained from bacillus megatherium and nicotinamide adenine dinucleotide (NAD), thereby effecting an enzymatic hydrolysis of the triglycerides and dehydrogenation of the resulting glycerol in one step with simultaneous reduction of the tetrazolium compound to formazan and determining colorimetrically at a wavelength in the range of 570-600nm the color developed by said reduction.
Claim 2
Independent Claim
101 words
A method of determining serum triglycerides by hydrolysis according to an enzymatic reaction, wherein a serum is added to a reaction liquid obtained by adding an aqueous solution of a mixture of a tetrazolium compound and phenazine methosulfate to an enzyme-coenzyme reagent comprising lipoprotein lipase (LPL), glycerol dehydrogenase (GDH) obtained from bacillus megatherium and nicotinamide adenine dinucleotide (NAD), thereby effecting an enzymatic hydrolysis of the triglycerides and dehydrogenation of the resulting glycerol in one step with simultaneous reduction of the tetrazolium compound to formazan and determining colorimetrically at a wavelength in the range of 570-600nm the color developed by said reduction.
Claim 3
Dependent Claim
25 words
A method of determining serum triglycerides according to claim 1, wherein LPL is an enzyme obtained from a culture liquid of chromobacterium viscosum var. paralipolyticum.
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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |