US4087567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticoagulant coating method
Assignee: Corning Glass Works
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Filing: 1977-06-10
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Granted: 1978-05-02
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Expires: 1997-06-10
Abstract
Abstract An anticoagulant coating composition suitable for coating the interior surfaces of a blood microsample collection tube, such as a capillary tube, is disclosed. The coating composition consists essentially of ethylene diamine tetracetate held in a matrix of polyvinyl pyrrolidone. Both the ethylene diamine tetracetate and the polyvinyl pyrrolidone are dissolved in a water-alcohol mixture to form a coating composition solution.
Inventors
- 👤 Kevin J. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:35
CPC Classifications
C; C09; C09D; C09D139/00; C09D139/04; C09D139/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
A method of coating the interior surface of a capillary blood sample tube comprising dispensing a quantity of an anticoagulant solution into the interior of said tube sufficient to coat the interior surface thereof, said solution comprising a filler and a solvent, said filler consists essentially of from about 10 percent to about 95 percent by weight of a salt of ethylene diamine tetracetate and from 5 to about 90% by weight of polyvinyl pyrrolidone, applying said solution to said interior surface by capillary action, and volatilizing said solvent.
Claim 2
Independent Claim
89 words
A method of coating the interior surface of a capillary blood sample tube comprising dispensing a quantity of an anticoagulant solution into the interior of said tube sufficient to coat the interior surface thereof, said solution comprising a filler and a solvent, said filler consists essentially of from about 10 percent to about 95 percent by weight of a salt of ethylene diamine tetracetate and from 5 to about 90% by weight of polyvinyl pyrrolidone, applying said solution to said interior surface by capillary action, and volatilizing said solvent.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said solvent is a mixture of up to about 90 percent alcohol, the remainder being water.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein said alcohol is methyl alcohol.
References Cited (Backward Citations)
US3958045A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-01 | 1981-10-31 | 1982-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-01 | 1985-10-31 | 1986-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-01 | 1989-10-31 | 1990-05-02 | $7700.00 | Window Closed / Lapsed |