Patent US3223636A successfully refreshed from Google Patents.
US3223636A
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Lead corrosion inhibitor
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-05-23
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Granted: 1965-12-14
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Expires: 1981-05-23
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Metro
- 👤 Alfred H Matuszak
- 👤 Robert E Barnum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:32
CPC Classifications
C; C10; C10M; C10M3/00; C10M2205/00; C10M2205/04; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/287; C10M2207/288; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/11; C10M2209/111; C10M2209/112; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
AN ESTER LUBRICATING OIL COMPOSITION FOR LUBRICATING IN THE PRESENCE OF LEAD-CONTAINING BEARINGS, COMPRISING A MAJOR AMOUNT OF A SYNTHETIC CARBOXYLIC ACID ESTER LUBRICATING OIL HAVING A TENDENCY TO CORODE LEAD, AND A LEAD CORROSION INHIBITING AMOUNT, WITHIN THE RANGE OF 0.1 TO 2.0 WT. PERCENT, OF A PRODUCT FORMED BY REACTING 1 TO 8 MOLAR PROPORTIONS OF C1 TO C5 SATURATED ALIPHATIC MONOHYDRIC ALCOHOL WITH A MOLAR PROPORTION OF A C6 TO C12 SATURATED ALIPHATIC DICHARBOXYLIC ACID BY HEATING UNDER REFLUX CONDITIONS FOR ABOUT 0.2 TO 6.0 HOURS, IN THE ABSENCE OF AN ESTERIFICATION CATALYST, WHEREBY SAID PRODUCT CONTAINS LESS THAN 30 WT. PERCENT DIESTER OF SAID ALCOHOL AND SAID DICARBOXYLIC ACID, AND HAS A TOTAL ACID NUMBER WITHIN THE RANGE OF 150 TO 600 MG. KOH/GM., AND AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE OF 300 TO 700 AS DETERMINED BY BOILING POINT RISE.
Claim 2
Dependent Claim
146 words
AN ESTER LUBRICATING OIL COMPOSITION FOR LUBRICATING IN THE PRESENCE OF LEAD-CONTAINING BEARINGS, COMPRISING A MAJOR AMOUNT OF A SYNTHETIC CARBOXYLIC ACID ESTER LUBRICATING OIL HAVING A TENDENCY TO CORODE LEAD, AND A LEAD CORROSION INHIBITING AMOUNT, WITHIN THE RANGE OF 0.1 TO 2.0 WT. PERCENT, OF A PRODUCT FORMED BY REACTING 1 TO 8 MOLAR PROPORTIONS OF C1 TO C5 SATURATED ALIPHATIC MONOHYDRIC ALCOHOL WITH A MOLAR PROPORTION OF A C6 TO C12 SATURATED ALIPHATIC DICHARBOXYLIC ACID BY HEATING UNDER REFLUX CONDITIONS FOR ABOUT 0.2 TO 6.0 HOURS, IN THE ABSENCE OF AN ESTERIFICATION CATALYST, WHEREBY SAID PRODUCT CONTAINS LESS THAN 30 WT. PERCENT DIESTER OF SAID ALCOHOL AND SAID DICARBOXYLIC ACID, AND HAS A TOTAL ACID NUMBER WITHIN THE RANGE OF 150 TO 600 MG. KOH/GM., AND AN AVERAGE MOLECULAR WEIGHT WITHIN THE RANGE OF 300 TO 700 AS DETERMINED BY BOILING POINT RISE.
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |