Patent US4657868A successfully refreshed from Google Patents.
US4657868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for testing reactions
Assignee: SAXHOLM AS
•
Filing: 1982-09-29
•
Granted: 1987-04-14
•
Expires: 2002-09-29
Abstract
Abstract A biologically active substance is incorporated in a unitary body with a magnetically responsive material for carrying out diffusion testing. These may be, microbiological, immunological, serological and other biochemical examinations. The body is applied against a substrate or medium by application of an external magnetic field and a reaction region is produced at the site of the body and is measured by means of a reader. In order to insure deposit of the body on the substrate a predetermined location and corresponding reading of the reaction region at such location, the support for the substrate and the dispenser and rear are provided with suitable releasable coupling and orienting devices such that the dispenser and reader can be respectively engaged and oriented on the support in predetermined secured positions.
Inventors
- 👤 Rolf Saxholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:15
CPC Classifications
C; C12; C12M; C12M35/00; C12M35/06; C12M23/00; C12M23/02; C12M23/10; C12M41/00; C12M41/46; G; G01; G01N; G01N2800/00; G01N2800/52; Y; Y10; Y10S; Y10S436/00; Y10S436/806
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
The combination comprising: an article for carrying out testing, said article comprising a test dose of an active substance which may react with an agent of a medium when the article is brought into contact with the medium, and metallic magnetically responsive means incorporated with said test dose in a solid porous inert carrier as a unitary body; and means for applying a magnetic force to said metallic magnetically responsive means.
Claim 2
Dependent Claim
71 words
The combination comprising: an article for carrying out testing, said article comprising a test dose of an active substance which may react with an agent of a medium when the article is brought into contact with the medium, and metallic magnetically responsive means incorporated with said test dose in a solid porous inert carrier as a unitary body; and means for applying a magnetic force to said metallic magnetically responsive means.
Claim 3
Dependent Claim
26 words
The combination as claimed in claim 1 wherein said means serves to urge said test dose against said medium and into active association with said agent.
Claim 4
Dependent Claim
19 words
The combination as claimed in claim 1 wherein said means serves to remove said unitary body from said medium.
Claim 5
Dependent Claim
27 words
The combination as claimed in claim 1 wherein said test dose is a specific substance related to said testing and distinct from said metallic magnetically responsive means.
Claim 6
Dependent Claim
95 words
The combination comprising: an article for carrying out testing, said article comprising a test dose of an active substance which may react with an agent of a medium when the article is brought into contact with the medium, and metallic magnetically responsive means incorporated with said test dose in a solid porous inert carrier as a unitary body; and means for applying a magnetic force to said metallic magnetically responsive means to urge said test dose against said medium and into active association with said agent and to remove said unitary body from said medium.
Claim 7
Dependent Claim
95 words
The combination comprising: an article for carrying out testing, said article comprising a test dose of an active substance which may react with an agent of a medium when the article is brought into contact with the medium, and metallic magnetically responsive means incorporated with said test dose in a solid porous inert carrier as a unitary body; and means for applying a magnetic force to said metallic magnetically responsive means to urge said test dose against said medium and into active association with said agent and to remove said unitary body from said medium.
Claim 8
Dependent Claim
27 words
The combination as claimed in claim 5 wherein said test dose is a specific substance related to said testing and distinct from said metallic magnetically responsive means.
References Cited (Backward Citations)
US3981776A
Cited
US4021308A
Cited
US3470067A
Cited
US3791930A
Cited
US3985608A
Cited
US4140582A
Cited
US4324859A
Cited
US3933997A
Cited
US4213825A
Cited
US4371624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-04-13 | 1990-10-13 | 1991-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-13 | 1994-10-13 | 1995-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-13 | 1998-10-13 | 1999-04-14 | $7700.00 | Window Closed / Lapsed |