Patent US2780601A successfully refreshed from Google Patents.
US2780601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved chemical reagent for the quantitative determination of water
Assignee: Pfizer Health AB
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Filing: 1952-12-09
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Granted: 1957-02-05
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Expires: 1972-12-09
Abstract
No abstract record available.
Inventors
- 👤 Blomgren Erik
- 👤 Jenner Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:56
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; G01N31/168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A STABILIZED KARL FISCHER REAGENT FOR THE DETERMINATION OF WATER COMPRISING, DISSOLVED IN A CONVENTIONAL SOLVENT, SULFUR DIOXIDE, PYRIDINE ABD FREE IODNE, AND ALSO CONTAINING IODIDE IONS IN AMOUNT SUFFICIENT TO SATISFY THE EQUATION:
Claim 2
Dependent Claim
34 words
A STABILIZED KARL FISCHER REAGENT FOR THE DETERMINATION OF WATER COMPRISING, DISSOLVED IN A CONVENTIONAL SOLVENT, SULFUR DIOXIDE, PYRIDINE ABD FREE IODNE, AND ALSO CONTAINING IODIDE IONS IN AMOUNT SUFFICIENT TO SATISFY THE EQUATION:
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |