US2953439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot test method for estimating neutralization number of a mineral oil
Assignee: Allis Chalmers Corp
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Filing: 1957-12-26
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Granted: 1960-09-20
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Expires: 1977-12-26
Abstract
No abstract record available.
Inventors
- 👤 William E Elliott
- 👤 Richard E Reinhard
- 👤 Eugene P Schram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:07
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SPOT TEST FOR DETERMINING WHETHER THE NEUTRALIZATION NUMBER OF A MINERAL OIL IS AT, ABOVE OR BELOW A PREDETERMINED CRITICAL VALUE BY OBSERVING THE COLORS DEVELOPED BY AN ORGANIC ACID-BASE INDICATOR EXHIBITING AN APPROXIMATELY EQUAL DISTRIBUTION OF A FIRST AND SECOND COLOR IN AN OIL SPOT HAVING A NEUTRALIZATION NUMBER AT SAID PREDETERMINED CRITICAL VALUE, SAID METHOD COMPRISING THE STEPS OF: PLACING SELECTED QUANTITY OF A COLOR CHANGE ADJUSTOR SOLUTION CONSISTING ESSENTIALLY OF SODIUM CARBONATE ON A POROUS MEDIUM POSSESSING UNIFORM ABSORPTIVE PROPERTIES TO FORM A SPOT THEREON, SAID COLOR ADJUSTOR SOLUTION HAVING SUFFICIENT NEUTRALIZING STRENGTH SO THAT WHEN A SPOT FORMED ON SAID POROUS MEDIUM BY SAID SOLUTION IS COMBINED WITH A SPOT FORMED BY A STANDARD LIQUID HAVING A NEUTRALIZATION NUMBER OF SAID PREDETERMINED
Claim 2
Dependent Claim
127 words
A SPOT TEST FOR DETERMINING WHETHER THE NEUTRALIZATION NUMBER OF A MINERAL OIL IS AT, ABOVE OR BELOW A PREDETERMINED CRITICAL VALUE BY OBSERVING THE COLORS DEVELOPED BY AN ORGANIC ACID-BASE INDICATOR EXHIBITING AN APPROXIMATELY EQUAL DISTRIBUTION OF A FIRST AND SECOND COLOR IN AN OIL SPOT HAVING A NEUTRALIZATION NUMBER AT SAID PREDETERMINED CRITICAL VALUE, SAID METHOD COMPRISING THE STEPS OF: PLACING SELECTED QUANTITY OF A COLOR CHANGE ADJUSTOR SOLUTION CONSISTING ESSENTIALLY OF SODIUM CARBONATE ON A POROUS MEDIUM POSSESSING UNIFORM ABSORPTIVE PROPERTIES TO FORM A SPOT THEREON, SAID COLOR ADJUSTOR SOLUTION HAVING SUFFICIENT NEUTRALIZING STRENGTH SO THAT WHEN A SPOT FORMED ON SAID POROUS MEDIUM BY SAID SOLUTION IS COMBINED WITH A SPOT FORMED BY A STANDARD LIQUID HAVING A NEUTRALIZATION NUMBER OF SAID PREDETERMINED
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |