US3000819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Finely divided metal salts as antioxidants for oils and greases
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1954-01-11
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Granted: 1961-09-19
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Expires: 1974-01-11
Abstract
No abstract record available.
Inventors
- 👤 James H Norton
- 👤 Lorne W Sproule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:17
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2201/00; C10M2201/04; C10M2201/041; C10M2201/085; C10M2201/10; C10M2201/102; C10M2201/103; C10M2201/105; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/122; C10M2207/124; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/289; C10M2207/34; C10M2211/00; C10M2211/08; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/02; C10M2219/024; C10M2219/04; C10M2219/044; C10N; C10N2010/00; C10N2010/02; C10N2010/06; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN THE METHOD OF INHIBITING AN OIL SELECTED FROM THE GROUP CONSISTING OF MINERAL AND SYNTHETIC ESTER OILS OF LUBRICATING GRADE BY DISPERSING THEREIN AN OXIDATION IN HIBITING MILDLY ALKALINE POLYALKALI-METAL PHOSPHATE SALT WHICH IS INSOLUBLE IN SAID OIL, AN IMPROVED METHOD OF DISPERSING SAID SALT WHICH COMPRISES SLOWLY ADDING TO SAID OIL IN A DRY UNDISSOLVED SOLID STATE A CRYSTALLIZED HYDRATE OF SAID SALT CONTAINING IN THE RANGE OF 6 TO 12 MOLES OF WATER OF CRYSTALLIZATION PER MOLE OF HYDRATE, AT A TEMPERATURE 50 TO 400*F. HIGHER THAN THE DEHYDRATION TEMPERATURE OF SAID HYDRATE TO DEHYDRATE AND DISINTEGRATE SAID HYDRATE.
Claim 2
Dependent Claim
102 words
IN THE METHOD OF INHIBITING AN OIL SELECTED FROM THE GROUP CONSISTING OF MINERAL AND SYNTHETIC ESTER OILS OF LUBRICATING GRADE BY DISPERSING THEREIN AN OXIDATION IN HIBITING MILDLY ALKALINE POLYALKALI-METAL PHOSPHATE SALT WHICH IS INSOLUBLE IN SAID OIL, AN IMPROVED METHOD OF DISPERSING SAID SALT WHICH COMPRISES SLOWLY ADDING TO SAID OIL IN A DRY UNDISSOLVED SOLID STATE A CRYSTALLIZED HYDRATE OF SAID SALT CONTAINING IN THE RANGE OF 6 TO 12 MOLES OF WATER OF CRYSTALLIZATION PER MOLE OF HYDRATE, AT A TEMPERATURE 50 TO 400*F. HIGHER THAN THE DEHYDRATION TEMPERATURE OF SAID HYDRATE TO DEHYDRATE AND DISINTEGRATE SAID HYDRATE.
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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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |