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US2994662A Expired / Lapsed US ⏱️ 0.0 years remaining

Lubricating compositions

Assignee: Shell USA Inc
•
Filing: 1957-12-02
•
Granted: 1961-08-01
•
Expires: 1977-12-02
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Abstract

No abstract record available.

Inventors

  • 👤 George M Calhoun
  • 👤 William A Hewett

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 08:38
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C323/00; C10M2203/00; C10M2203/06; C10M2203/10; C10M2205/00; C10M2205/14; C10M2205/16; C10M2205/17; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/023; C10M2207/027; C10M2207/04; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/125; C10M2207/128; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/402; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/107; C10M2209/108; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2020/00; C10N2020/01; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 26 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 1% TO 5% OF A SULFUR-CONTAINING CARBOXYLIC ACID HAVING THE FORMULA
Claim 2
Dependent Claim 26 words
A LUBRICATING OIL COMPOSITION COMPRISING A MAJOR AMOUNT OF MINERAL LUBRICATING OIL AND FROM ABOUT 1% TO 5% OF A SULFUR-CONTAINING CARBOXYLIC ACID HAVING THE FORMULA

References Cited (Backward Citations)

US2317666A Cited
US2449996A Cited
US2459717A Cited
US2644793A Cited
US2737525A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1964-07-31 1965-01-30 1965-08-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1968-07-31 1969-01-30 1969-08-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1972-07-31 1973-01-30 1973-08-01 $7700.00 Window Closed / Lapsed

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