US2950958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determination of minute traces of water by use of methylene blue
Assignee: Individual
•
Filing: 1956-09-24
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Granted: 1960-08-30
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Nesh Florence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:40
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/222; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR DETERMINING THE PRESENCE OF TRACE AMOUNTS OF WATER IN A LIQUID MATERIAL TO BE EXAMINED AND THAT CONTAINS NO WATER MOLECULES AND NO POTENTIAL WATER MOLECULES AS A BASIC PARTS OF ITS STRUCTURE, WHICH COMPRISES ADDING TO SAID MATERIAL ANHYDROUS CARBON TETRACHLORIDE IN A QUANTITY SUFFICIENT TO FREE ANY WATER THAT IS INCORPORATED IN SAID LIQUID MATERIAL, AGITATING THIS MIXTURE TO FREE ANY WATER INCORPORATED THEREIN, AND THEN ADDING TO THE MIXTURE A SMALL QUANTITY OF DRY, WATER SOLUBLE, METHYLENE BLUE, WHEREBY ANY WATER RELEASED FROM SAID LIQUID MATERIAL WILL DISSOLVE SAID METHYLENE BLUE AND CHANGE ITS COLOR TO A DEEP BLUE.
Claim 2
Independent Claim
105 words
A METHOD FOR DETERMINING THE PRESENCE OF TRACE AMOUNTS OF WATER IN A LIQUID MATERIAL TO BE EXAMINED AND THAT CONTAINS NO WATER MOLECULES AND NO POTENTIAL WATER MOLECULES AS A BASIC PARTS OF ITS STRUCTURE, WHICH COMPRISES ADDING TO SAID MATERIAL ANHYDROUS CARBON TETRACHLORIDE IN A QUANTITY SUFFICIENT TO FREE ANY WATER THAT IS INCORPORATED IN SAID LIQUID MATERIAL, AGITATING THIS MIXTURE TO FREE ANY WATER INCORPORATED THEREIN, AND THEN ADDING TO THE MIXTURE A SMALL QUANTITY OF DRY, WATER SOLUBLE, METHYLENE BLUE, WHEREBY ANY WATER RELEASED FROM SAID LIQUID MATERIAL WILL DISSOLVE SAID METHYLENE BLUE AND CHANGE ITS COLOR TO A DEEP BLUE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |