US3897214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diagnostic device
Assignee: Roche Diagnostics GmbH
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Filing: 1972-11-13
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Granted: 1975-07-29
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Expires: 1992-11-13
Abstract
Abstract Diagnostic agent for the detection of components contained in liquids, e.g. body fluids, comprising a felt or fleece of preponderantly polyamide fibers and impregnated with appropriate reagents.
Inventors
- 👤 Hans Lange
- 👤 Walter Rittersdorf
- 👤 Hans-Georg Rey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:57
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10T; Y10T436/00; Y10T436/14; Y10T436/145555; Y10T436/146666; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
34 words
DIAGNOSTIC DEVICE FOR THE DETECTION OF COMPONENTS CONTAINED IN LIQUIDS, WHICH DIAGNOSTIC DEVICE COMPRISES AN ABSRBENT CARRIER COMPRISING FELT OR FLEECE PREPONDERANTLY CONSISTING OF POLYAMIDE FIBERS, WHEREIN SAID CARRIER IS IMPREGNATED WITH APPROPRIATE REGENTS.
Claim 2
Dependent Claim
34 words
DIAGNOSTIC DEVICE FOR THE DETECTION OF COMPONENTS CONTAINED IN LIQUIDS, WHICH DIAGNOSTIC DEVICE COMPRISES AN ABSRBENT CARRIER COMPRISING FELT OR FLEECE PREPONDERANTLY CONSISTING OF POLYAMIDE FIBERS, WHEREIN SAID CARRIER IS IMPREGNATED WITH APPROPRIATE REGENTS.
Claim 3
Dependent Claim
24 words
Diagnostic device as claimed in claim 1 wherein said absorbent carrier contains up to 50 percent by weight of fibers other than polyamide fibers.
Claim 4
Dependent Claim
28 words
Diagnostic device as claimed in claim 2 wherein said other fiber is at least one member of the group consisting of polyester fibers, polyvinylchloride fibers and cellulose fibers.
Claim 5
Dependent Claim
17 words
Diagnostic device as claimed in claim 1 in which the felt or fleece fibers are oriented directionally.
Claim 6
Dependent Claim
17 words
Diagnostic device as claimed in claim 1 in which the felt or fleece fibers are randomly disposed.
Claim 7
Dependent Claim
24 words
Diagnostic device as claimed in claim 1 wherein the fibers of the felt or fleece are bonded thermally or by means of bonding agenTs.
Claim 8
Dependent Claim
18 words
Diagnostic device as claimed in claim 1 wherein said felt or fleece is a needled felt or fleece.
Claim 9
Dependent Claim
16 words
Diagnostic device as claimed in claim 1 wherein said carrier is impregnated with a wetting agent.
Claim 10
Dependent Claim
27 words
Diagnostic device as claimed in claim 1 wherein the reagents are strongly alkaline phosphate buffer, sodium nitroferricyanide and glycocoll, for carrying out Legal''s test for ketonic bodies.
Claim 11
Dependent Claim
22 words
Diagnostic device as claimed in claim 1 wherein the reagents are potassium bisulfate and p-dimethylaminobenzaldehyde, for carrying out Ehrlich''s test for urobilinogen.
Claim 12
Dependent Claim
27 words
Diagnostic device as claimed in claim 1 wherein said absorbent composition is in the form of a narrow strip adhered to a synthetic resin backing extending therefrom.
Claim 13
Dependent Claim
18 words
Diagnostic device as claimed in claim 1 wherein said absorbent carrier is sealed between two synthetic resin films.
Claim 14
Dependent Claim
23 words
Diagnostic device as claimed in claim 1 wherein said absorbent carrier is sealed between a synthetic resin film and a synthetic resin mesh.
Claim 15
Dependent Claim
19 words
Diagnostic device as claimed in claim 9 wherein said absorbent carrier consists essentially of pure polyamide felt or fleece.
Claim 16
Dependent Claim
21 words
Diagnostic device as claimed in claim 10 wherein said absorbent carrier is a mixed felt or fleece also containing polyester fibers.
Claim 17
Dependent Claim
15 words
Diagnostic device as claimed in claim 1 wherein the polyamide is of the nylon type.
Claim 18
Dependent Claim
15 words
Diagnostic device as claimed in claim 1 wherein the polyamide is of the perlon type.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |