US4331767A
Expired / Lapsed
US
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Immobilized enzyme column
Assignee: Astellas Pharma Inc
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Filing: 1979-09-04
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Granted: 1982-05-25
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Expires: 1999-09-04
Abstract
Abstract PCT No. PCT/JP79/00234 Sec. 371 Date Apr. 22, 1980 Sec. 102(e) Date Apr. 22, 1980 PCT Filed Sep. 4, 1979 PCT Pub. No. WO80/00574 PCT Pub. Date Apr. 3, 1980. An immobilized enzyme column useful for automatic chemical analyzers for analyzing substances contained in the blood serum, urine or the like with use of an enzyme for clinical tests includes at least one column main body (19, 34 or 44, 51 and 52). The column has a channel (31) extending from a sample inlet (24) to a sample outlet (27). An air bubble inlet (28) is disposed close to the sample outlet to communicate with the channel (31), and an air bubble outlet (25) is disposed close to the sample inlet to communicate with the channel. An immobilized enzyme accommodating portion (20 or 35) is provided in the channel between the bubble inlet (28) and the bubble outlet (25) and partitioned by a filter (29) at each end thereof.
Inventors
- 👤 Takao Nakajima
- 👤 Masafumi Terada
- 👤 Tohru Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/08; C; C12; C12M; C12M21/00; C12M21/18; C12M23/00; C12M23/34; C12M29/00; C12M29/04; C12M29/06; C12Q; C12Q1/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
259 words
An immobilized enzyme column apparatus having an immobilized enzyme for analyzing chemical samples in a chemical analyzer comprising: at least one column main body having a channel formed therethrough for accomodating said immobilized enzyme wherein said enzyme is disposed in said channel; sample inlet means having an inlet formed at an outer end portion thereof and having an inner end portion connected to said column main body; sample outlet means having an outlet formed at an outer end portion thereof and having an inner end portion connected to said column main body such that a flow path for said chemical samples is formed from said inlet means through said channel over said immobilized enzyme, and through said outlet means; an air bubble inlet nozzle operatively associated with and communicating with said outlet means and disposed proximate to said immobilized enzyme such that the distance between said inlet nozzle and said immobilized enzyme is minimized; an air bubble outlet nozzle operatively associated with and communicating with said inlet means and disposed proximate to said immobilized enzyme such that the distance between said inlet nozzle and said immobilized enzyme is minimized, and wherein said inlet nozzle, outlet nozzle and column main body are substantially integral and removable from said chemical analyzer as an integral unit; and a filter disposed at each end portion of said channel wherein each of said samples enters said sample inlet means, flows past said air bubble outlet nozzle into said column main body channel, past said air bubble inlet nozzle and exits through said outlet means.
Claim 2
Dependent Claim
259 words
An immobilized enzyme column apparatus having an immobilized enzyme for analyzing chemical samples in a chemical analyzer comprising: at least one column main body having a channel formed therethrough for accomodating said immobilized enzyme wherein said enzyme is disposed in said channel; sample inlet means having an inlet formed at an outer end portion thereof and having an inner end portion connected to said column main body; sample outlet means having an outlet formed at an outer end portion thereof and having an inner end portion connected to said column main body such that a flow path for said chemical samples is formed from said inlet means through said channel over said immobilized enzyme, and through said outlet means; an air bubble inlet nozzle operatively associated with and communicating with said outlet means and disposed proximate to said immobilized enzyme such that the distance between said inlet nozzle and said immobilized enzyme is minimized; an air bubble outlet nozzle operatively associated with and communicating with said inlet means and disposed proximate to said immobilized enzyme such that the distance between said inlet nozzle and said immobilized enzyme is minimized, and wherein said inlet nozzle, outlet nozzle and column main body are substantially integral and removable from said chemical analyzer as an integral unit; and a filter disposed at each end portion of said channel wherein each of said samples enters said sample inlet means, flows past said air bubble outlet nozzle into said column main body channel, past said air bubble inlet nozzle and exits through said outlet means.
Claim 3
Dependent Claim
18 words
The immobilized enzyme column of claim 1 further comprising a removable enzyme accommodating tube disposed within said channel.
Claim 4
Dependent Claim
24 words
The immobolized enzyme column of claim 1 further comprising means for mounting said inlet nozzle and said outlet nozzle on said column main body.
Claim 5
Dependent Claim
54 words
The immobilized enzyme column of claim 1 wherein said inlet means further comprises a first tubular member having means for detachably mounting said inlet means on said column main body and wherein said outlet means further comprises a second tubular member having means for detachably mounting said outlet means on said column main body.
Claim 6
Dependent Claim
46 words
The immobilized enzyme column of claim 4 wherein each of said first and second tubular members further comprises an externally threaded base portion and wherein said column main body further comprises internally threaded cavities formed therein for mating engagement with said first and second tubular members.
Claim 7
Dependent Claim
45 words
The immobilized enzyme column of claim 4 wherein each of said first and second tubular members further comprises an internally threaded base portion and wherein said column main body further comprises an externally threaded portion for mating engagement with said first and second tubular members.
Claim 8
Dependent Claim
57 words
The immobilized enzyme column of claim 4 wherein each of said first and second tubular members further comprises a base portion having a substantially smooth outer surface portion and wherein said column main body further comprises first and second cavities formed therein having substantially smooth walls for intimate engagement with said first and second tubular members, respectively.
Claim 9
Dependent Claim
40 words
The immobilized enzyme column of claim 4 wherein said first tubular member further comprises means for hermetically mating with said air bubble outlet and wherein said second tubular member further comprises means for hermetically mating with said air bubble inlet.
Claim 10
Dependent Claim
27 words
The immobilized enzyme column of claim 4 further comprising a packing member disposed between each said filter element and each of said first and second tubular members.
Claim 11
Dependent Claim
39 words
The immobilized enzyme column of claims 1, 4 or 9 wherein said at least one column main body further comprises first and second column main bodies and means for connecting said first and second column main bodies in seriatim.
Claim 12
Dependent Claim
53 words
The immobilized inzyme column of claims 10 wherein said connecting means further comprises an externally threaded outer surface portion on said first column main body and an internally threaded inner surface portion on said second column main body for engaging with said externally threaded outer surface portion on said first column main body.
Claim 13
Dependent Claim
69 words
The immobilized enzyme column of claim 10 wherein said connecting means further comprises a tubular connecting member having externally threaded outer surface portions provided on first and second end portions thereof, said first and second column main bodies further comprising first and second internally threaded inner surface portions for mating engagement with said first and second threaded end portions of said tubular connecting member, respectively, of said tubular member.
References Cited (Backward Citations)
US3028224A
Cited
US3047367A
Cited
US3743103A
Cited
US3826615A
Cited
US3811841A
Cited
US4188466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |