Patent US3689364A successfully refreshed from Google Patents.
US3689364A
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Sensitive color indicators for lipase determinations
Assignee: Merck Patent GmbH
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Filing: 1969-09-15
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Granted: 1972-09-05
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Expires: 1989-09-15
Abstract
Abstract IN LIPASE DETERMINATIONS OF BODY FLUIDS, E.G. SERUM, BY USING A FATTY OR OILY EMULSION SUBSTRATE, THE TITRATION OF LIBERATED FATTY ACID IS FACILITATED BY EMPLOYING ONE OR MORE INDICATORS OF THE GROUP M-CRESOL PURPLE, P-XYLENOLSULFONEPHTHALEIN, DIBROMOTHYMOLSULFONEPHTHALEIN, THYMOLSULFONEPHTHALEIN AND A-NAPHTHOLPHTHALEIN.
Inventors
- 👤 Arnold Hartel
- 👤 Roland Helger
- 👤 Hermann Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:38
CPC Classifications
C; C12; C12Q; C12Q1/00; C12Q1/34; C12Q1/44
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |