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Patent US2528466A successfully refreshed from Google Patents.
US2528466A
Expired / Lapsed
US
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Foam inhibited oils
Assignee: California Research LLC
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Filing: 1947-09-18
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Granted: 1950-10-31
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Expires: 1967-09-18
Abstract
No abstract record available.
Inventors
- 👤 Victor N Borsoff
- 👤 James O Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:23
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/023; C10M2207/027; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/288; C10M2219/00; C10M2219/08; C10M2219/082; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/042; C10M2223/045; C10N; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A FOAM INHIBITED COMPOUNDED MINERAL OIL, COMPRISING A MAJOR QUANTITY OF A PETROLEUM LUBRICATING OIL CONTAINING AN OIL-SOLUBLE FOAMINGPROMOTING METAL SALT SELECTED FROM THE GROUP CONSISTING OF POLYVALENT METAL PHENATES AND POLYVALENT METAL SALTS OF ORGANO SUBSTITUTED ACIDS OF PHOSPHORUS AND IN AN AMOUNT SUFFFICIENT SUBSTANTIALLY TO INCREASE THE TENDENCY OF THE LUBRICATING OIL TO FOAM EXCESSIVELY AT TEMPERATURES ABOVE 150*F. UNDER CONDITIONS OF SEVERE OIL AGITATION AND INTERMIXTURE WITH GAS, AND A MINOR QUANTITY, SUFFICIENT TO INHIBIT FOAMING, OF AN ALIPHATIC COMPOUND CONSISTING OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF CARBON, HYDROGEN, AND OXYGEN HAVING A MOLECULAR WEIGHT NOT GREATER THAN 225, CONTAINING NOT LESS THAN ABOUT 25% BY WEIGHT OF OXYGEN AND WHICH IS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
121 words
A FOAM INHIBITED COMPOUNDED MINERAL OIL, COMPRISING A MAJOR QUANTITY OF A PETROLEUM LUBRICATING OIL CONTAINING AN OIL-SOLUBLE FOAMINGPROMOTING METAL SALT SELECTED FROM THE GROUP CONSISTING OF POLYVALENT METAL PHENATES AND POLYVALENT METAL SALTS OF ORGANO SUBSTITUTED ACIDS OF PHOSPHORUS AND IN AN AMOUNT SUFFFICIENT SUBSTANTIALLY TO INCREASE THE TENDENCY OF THE LUBRICATING OIL TO FOAM EXCESSIVELY AT TEMPERATURES ABOVE 150*F. UNDER CONDITIONS OF SEVERE OIL AGITATION AND INTERMIXTURE WITH GAS, AND A MINOR QUANTITY, SUFFICIENT TO INHIBIT FOAMING, OF AN ALIPHATIC COMPOUND CONSISTING OF ELEMENTS SELECTED FROM THE GROUP CONSISTING OF CARBON, HYDROGEN, AND OXYGEN HAVING A MOLECULAR WEIGHT NOT GREATER THAN 225, CONTAINING NOT LESS THAN ABOUT 25% BY WEIGHT OF OXYGEN AND WHICH IS REPRESENTED BY THE FORMULA
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |