US5213765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood collection tube
Assignee: Terumo Corp
•
Filing: 1991-04-26
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Granted: 1993-05-25
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Expires: 2011-04-26
Abstract
Abstract A blood collection tube includes a bottom and an open end that is hermetically sealed by a plug. A supporting film having an anticoagulant coated thereon is positioned within the tube. The anticoagulant-coated surface of the supporting member is provided with a large number of fine convexes.
Inventors
- 👤 Masaaki Kasai
- 👤 Sakae Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:59
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/483; G01N33/487; G01N33/49; G01N33/491; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
106 words
A blood collection tube comprising a tube having a bottom and an open end that is hermetically sealed by a plug, and a supporting film positioned in the tube, said supporting film having an anticoagulant coated thereon to define an anticoagulant-coated surface, the anticoagulant-coated surface of said supporting film having a large number of fine convexes and said anticoagulant containing a surfactant, said large number of said fine convexes being made such that 2˜500 convexes having a height of 0.2 μm or more exist per a length of 1 mm of the film, and wherein 0.2˜1 wt % of said surfactant is contained in said anticoagulant.
Claim 2
Dependent Claim
106 words
A blood collection tube comprising a tube having a bottom and an open end that is hermetically sealed by a plug, and a supporting film positioned in the tube, said supporting film having an anticoagulant coated thereon to define an anticoagulant-coated surface, the anticoagulant-coated surface of said supporting film having a large number of fine convexes and said anticoagulant containing a surfactant, said large number of said fine convexes being made such that 2˜500 convexes having a height of 0.2 μm or more exist per a length of 1 mm of the film, and wherein 0.2˜1 wt % of said surfactant is contained in said anticoagulant.
Claim 3
Dependent Claim
38 words
A blood collection tube, as set forth in claim 1, in which said tube accommodates a thixotropic gel having a specific gravity of 1.03˜1.60, and the specific gravity of said film is heavier than that of said gel.
Claim 4
Dependent Claim
20 words
A blood collection tube, as set forth in claim 1, in which said anticoagulant is heparin sodium or heparin lithium.
Claim 5
Dependent Claim
17 words
A blood collection tube, as set forth in claim 1, in which said surfactant is water-soluble silicone.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |