US3193356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for determining the presence of strong acids in oils
Assignee: ExxonMobil Oil Corp
•
Filing: 1962-03-28
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Granted: 1965-07-06
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Expires: 1982-03-28
Abstract
No abstract record available.
Inventors
- 👤 Melvin I Smith
- 👤 Thomas J Mckeon
- 👤 Louis H Sudholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221; Y; Y10; Y10T; Y10T436/00; Y10T436/15; Y10T436/153333
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD FOR DETERMINING THE PRESENCE OF DANGEROUS AMOUNTS OF STRONG ACIDS IN USED OIL FROM MARINE ENGINES AND THE LIKE WHICH COMPRISESD MIXING AN AMOUNT OF USED OIL WITH INDICATOR WHICH WILL CHANGE COLOR IN THE PRESENCE OF STRONG ACIDS, SAID INDICATOR CONTAINING A SUFFICIENT AMOUNT OF BASIC MATERIAL SO THAT WHEN MIXED WITH ACID OIL NO COLOR CHANGE OCCURS UNLESS THE OIL CONTAINS A STRONG ACID NUMBER OF AT LEAST ABOUT 0.05, THE OIL BEING FREE OF DANGEROUS AMOUNTS OF STRONG ACIDS IF THE COLOR REMAINS UNCHANGED AND SAID OIL CONTAINING DANGEROUS AMOUNTS OF STRONG ACIDS REQUIRING ITS REPLACEMENT OR TREATMENT IF THE COLOR IS CHANGED.
Claim 2
Independent Claim
108 words
A METHOD FOR DETERMINING THE PRESENCE OF DANGEROUS AMOUNTS OF STRONG ACIDS IN USED OIL FROM MARINE ENGINES AND THE LIKE WHICH COMPRISESD MIXING AN AMOUNT OF USED OIL WITH INDICATOR WHICH WILL CHANGE COLOR IN THE PRESENCE OF STRONG ACIDS, SAID INDICATOR CONTAINING A SUFFICIENT AMOUNT OF BASIC MATERIAL SO THAT WHEN MIXED WITH ACID OIL NO COLOR CHANGE OCCURS UNLESS THE OIL CONTAINS A STRONG ACID NUMBER OF AT LEAST ABOUT 0.05, THE OIL BEING FREE OF DANGEROUS AMOUNTS OF STRONG ACIDS IF THE COLOR REMAINS UNCHANGED AND SAID OIL CONTAINING DANGEROUS AMOUNTS OF STRONG ACIDS REQUIRING ITS REPLACEMENT OR TREATMENT IF THE COLOR IS CHANGED.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |