Patent US2671937A successfully refreshed from Google Patents.
Patent US2529304A successfully refreshed from Google Patents.
US2529304A
Expired / Lapsed
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Extreme pressure lubricants
Assignee: Standard Oil Development Co
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Filing: 1948-02-19
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Granted: 1950-11-07
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Louis A Mikeska
- 👤 Elmer B Cyphers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:41
CPC Classifications
C; C10; C10M; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/047; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/20; C10N2040/22; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
AN EXTREME PRESSURE ADDITIVE COMPOSITION FOR MINERAL OIL BASE LUBRICANTS CONSISTING ESSENTIALLY OF THE CONDENSATION PRODUCT OF HALOGENATED FATTY MATERIAL CONTAINING AT LEAST TWO HALOGEN ATOMS WITH AN ALKALI METAL SALT OF A DITHIOPHOSPHORIC ACID DIESTER, EACH OF THE ESTERIFYING GROUPS OF SAID ESTER BEING SELECTED FROM THE CLASS WHICH CONSISTS OF ALKYL AND ALKARYL RADICALS OF 2 TO 10 CARBON ATOMS IN THE ALKYL CHAIN.
Claim 2
Dependent Claim
66 words
AN EXTREME PRESSURE ADDITIVE COMPOSITION FOR MINERAL OIL BASE LUBRICANTS CONSISTING ESSENTIALLY OF THE CONDENSATION PRODUCT OF HALOGENATED FATTY MATERIAL CONTAINING AT LEAST TWO HALOGEN ATOMS WITH AN ALKALI METAL SALT OF A DITHIOPHOSPHORIC ACID DIESTER, EACH OF THE ESTERIFYING GROUPS OF SAID ESTER BEING SELECTED FROM THE CLASS WHICH CONSISTS OF ALKYL AND ALKARYL RADICALS OF 2 TO 10 CARBON ATOMS IN THE ALKYL CHAIN.
Claim 3
Dependent Claim
76 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MINERAL OIL BASE LUBRICANT CONTAINING 1 TO 20% BY WEIGHT OF THE PRODUCT OBTAINED BY AT LEAST PARTIALLY REACTING A HOLOGENATED ALIPHATIC CARBOXYLIC ACID ESTER CONTAINING AT LEAST 2 HALOGEN ATOMS WITH A DIHYDROCARBON SUBSTITUTED METAL SALT OF DITHIOPHOSPHORIC ACID, SAID DIHYDROCARBON SUBSTITUENT CONSISTING OF LIKE HYDROCARBON RADICALS SELECTED FROM THE CLASS WHICH CONSISTS OF ALKYL AND ALKARYL RADICALS HAVING 2 TO 10 CARBON ATOMS IN THE ALKYL CHAIN.
Claim 4
Dependent Claim
76 words
A LUBRICATING COMPOSITION CONSISTING ESSENTIALLY OF A MINERAL OIL BASE LUBRICANT CONTAINING 1 TO 20% BY WEIGHT OF THE PRODUCT OBTAINED BY AT LEAST PARTIALLY REACTING A HOLOGENATED ALIPHATIC CARBOXYLIC ACID ESTER CONTAINING AT LEAST 2 HALOGEN ATOMS WITH A DIHYDROCARBON SUBSTITUTED METAL SALT OF DITHIOPHOSPHORIC ACID, SAID DIHYDROCARBON SUBSTITUENT CONSISTING OF LIKE HYDROCARBON RADICALS SELECTED FROM THE CLASS WHICH CONSISTS OF ALKYL AND ALKARYL RADICALS HAVING 2 TO 10 CARBON ATOMS IN THE ALKYL CHAIN.
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) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |