US3799885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test system for monitoring heparin
Assignee: Becton Dickinson and Co
•
Filing: 1972-08-21
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Granted: 1974-03-26
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Expires: 1992-08-21
Abstract
Abstract A TEST SYSTEM EMPOLYING A NOVEL BUFFERED CALCIUM CHLORIDE REAGENT ADAPTED FOR USE IN MONITORING HEPERIN THERAPY IS DISCLOSED. THE BUFFERED TEST REAGENT IS A PH STABLE CALCIUM CHLORIDE SOLUTION HAVING AN ACTIVATOR ADMIXED THEREWITH. THE NOVEL BUFFER EMPOLYED IS N-2-HYDROXY ETHYL PIPERAZINES-N''-2-ETHANE SULFONIC ACID.
Inventors
- 👤 L Dennis
- 👤 W Reno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:28
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/86; G01N2400/00; G01N2400/10; G01N2400/38; G01N2400/40; Y; Y10; Y10T; Y10T436/00; Y10T436/14; Y10T436/142222; Y10T436/143333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |