Patent US1888904A successfully refreshed from Google Patents.
US4151832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serum abstraction device
Assignee: Individual
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Filing: 1977-03-21
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Granted: 1979-05-01
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Expires: 1997-03-21
Abstract
Abstract A vacuum housing connected to a vacuum generator has one open end covered by a fine sieve to provide a serum collection space. A test strip of blotting paper is flush against an intermediate air permeable membrane which is in turn flush against a support sieve.
Inventors
- 👤 Geerd Hamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:18
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/0045; G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/14; A61B2010/0003; A61B2010/0006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
97 words
A device for the extraction of tissue serum comprising a vacuum housing having an open end, a fine sieve covering said open end and positioned to directly contact said tissue in use to define a serum collecting space in said vacuum housing behind said sieve, a test strip in said serum collecting space a short distance from said fine sieve. a support sieve for said test strip on one side of said test strip, and means for connecting said vacuum housing to a vacuum generator, whereby said serum is drawn through said sieve into said collecting space.
Claim 2
Independent Claim
97 words
A device for the extraction of tissue serum comprising a vacuum housing having an open end, a fine sieve covering said open end and positioned to directly contact said tissue in use to define a serum collecting space in said vacuum housing behind said sieve, a test strip in said serum collecting space a short distance from said fine sieve. a support sieve for said test strip on one side of said test strip, and means for connecting said vacuum housing to a vacuum generator, whereby said serum is drawn through said sieve into said collecting space.
Claim 3
Dependent Claim
23 words
The device as defined in claim 1 wherein said test strip is introduceable in an essentially airtight manner into said serum collecting space.
Claim 4
Dependent Claim
17 words
The device as defined in claim 1 wherein said vacuum housing has the form of a tube.
Claim 5
Dependent Claim
17 words
The device as defined in claim 1 wherein said test strip is located directly behind said sieve.
Claim 6
Dependent Claim
26 words
The device as defined in claim 1 wherein said support sieve for said test strip is in flush contact with one side of said test strip.
Claim 7
Dependent Claim
12 words
The device as defined in claim 1 wherein said sieve is concave.
Claim 8
Dependent Claim
23 words
The device as defined in claim 1 comprising a membrane permeable only to air located between said test strip and said support sieve.
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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |