Patent US3030190A successfully refreshed from Google Patents.
US3030190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of chemical testing of oils
Assignee: Shell USA Inc
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Filing: 1960-04-26
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Granted: 1962-04-17
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Expires: 1980-04-26
Abstract
No abstract record available.
Inventors
- 👤 Walter P Seemann
- 👤 Hellberg Harald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:45
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A METHOD OF DETERMINING THE NEUTRALIZATION NUMBER OF MINERAL OILS WHICH ARE SUBJECTED TO CONTAMINATION WITH ACIDIC SUBSTANCES AND CONCOMITANT DETERIORATION WHICH COMPRISES MEASURING A SAMPLE OF THE OIL AND DISSOLVING IT IN AN ALCOHOL-BENZENE SOLUTION CONTAINING AN INDICATOR AND DISSOLVING THEREIN THE NUMBER OF TABLETS HAVING DISSOCIATION CONSTANTS OF FROM 5.3X10-9 TO 10X10-9 OF ALKALI NITROPHENATE UNTIL THERE IS A VISUAL COLOR CHANGE.
Claim 2
Independent Claim
64 words
A METHOD OF DETERMINING THE NEUTRALIZATION NUMBER OF MINERAL OILS WHICH ARE SUBJECTED TO CONTAMINATION WITH ACIDIC SUBSTANCES AND CONCOMITANT DETERIORATION WHICH COMPRISES MEASURING A SAMPLE OF THE OIL AND DISSOLVING IT IN AN ALCOHOL-BENZENE SOLUTION CONTAINING AN INDICATOR AND DISSOLVING THEREIN THE NUMBER OF TABLETS HAVING DISSOCIATION CONSTANTS OF FROM 5.3X10-9 TO 10X10-9 OF ALKALI NITROPHENATE UNTIL THERE IS A VISUAL COLOR CHANGE.
References Cited (Backward Citations)
US1840445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |