Patent US2820013A successfully refreshed from Google Patents.
US2820013A
Expired / Lapsed
US
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Stabilized extreme pressure lubricant
Assignee: Pure Oil Co
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Filing: 1956-01-13
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Granted: 1958-01-14
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Paul R Chapman
- 👤 Allan A Manteuffel
- 👤 Wolfram George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:42
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/026; C10M2205/04; C10M2205/22; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/101; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/26; C10M2215/28; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/08; C10M2219/082; C10M2219/083; C10M2223/00; C10M2223/08; C10M2223/12; C10M2229/00; C10M2229/04; C10M2229/041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
AN EXTREME PRESSURE LUBRICANT WHICH COMPRISES A MINERAL OIL, AN EXTREME PRESSURE ADDITIVE COMPRISING AT LEAST ONE PHOSPHORIZED AND SULFURIZED ESTER OF A FATTY ACID AND ALIPHATIC ALCOHOL, IN AMOUNT SUFFICIENT TO ENHANCE THE LOAD-CARRYING PROPERTIES OF THE OIL, AND A NITROGEN-CONTAINING COMPOUND COMPRISING AT LEAST ONE SUBSTANCE OF THE GROUP CONSISTING OF ALIPHATIC HYDROXY AMINES HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATOMS, ALIPHATIC HYDROXY AMINES HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATO MS AND ALIPHATIC HYDROXY AMINE SALTS, HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATOMS, OF FATTY ACIDS, SAID SUBSTANCE BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPROVE THE STORAGE STABILITY OF SAID LUBRICANT.
Claim 2
Dependent Claim
120 words
AN EXTREME PRESSURE LUBRICANT WHICH COMPRISES A MINERAL OIL, AN EXTREME PRESSURE ADDITIVE COMPRISING AT LEAST ONE PHOSPHORIZED AND SULFURIZED ESTER OF A FATTY ACID AND ALIPHATIC ALCOHOL, IN AMOUNT SUFFICIENT TO ENHANCE THE LOAD-CARRYING PROPERTIES OF THE OIL, AND A NITROGEN-CONTAINING COMPOUND COMPRISING AT LEAST ONE SUBSTANCE OF THE GROUP CONSISTING OF ALIPHATIC HYDROXY AMINES HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATOMS, ALIPHATIC HYDROXY AMINES HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATO MS AND ALIPHATIC HYDROXY AMINE SALTS, HAVING AT LEAST ONE CARBON CHAIN OF AT LEAST 16 CARBON ATOMS, OF FATTY ACIDS, SAID SUBSTANCE BEING PRESENT IN AN AMOUNT SUFFICIENT TO IMPROVE THE STORAGE STABILITY OF SAID LUBRICANT.
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |