Patent US4003839A successfully refreshed from Google Patents.
US4003839A
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US
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Non-foaming lubrication oil
Assignee: Borg Warner Corp
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Filing: 1974-05-09
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Granted: 1977-01-18
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Expires: 1994-05-09
Abstract
Abstract A lubrication oil having improved resistance to foaming and a method for preventing foaming of lubrication oils comprising the adding of dehydrating agents to the lubrication oil.
Inventors
- 👤 Jan Willem van Hesden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:24
CPC Classifications
C; C10; C10M; C10M171/00; C10M171/004; C10M101/00; C10M2201/00; C10M2201/06; C10M2201/063; C10M2201/08; C10M2201/081; C10M2201/082; C10M2201/084; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/124; C10M2207/125; C10M2207/129; C10M2207/22; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/24; C10M2215/26; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2010/00; C10N2010/04; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
40 words
A lubrication oil composition having improved resistance to foaming in use comprising a lubrication oil and a foam preventing amount of an annydrous alkali metal or alkaline earth metal compound selected from the group consisting of oxides, sulfates and halides.
Claim 2
Dependent Claim
40 words
A lubrication oil composition having improved resistance to foaming in use comprising a lubrication oil and a foam preventing amount of an annydrous alkali metal or alkaline earth metal compound selected from the group consisting of oxides, sulfates and halides.
Claim 3
Independent Claim
38 words
A method for the prevention of foaming in lubricating oils comprising the addition thereto of a foam-preventing amount of an annydrous alkali metal or alkaline earth metal compound selected from the group consisting of oxides, sulfates and halides.
Claim 4
Independent Claim
38 words
A method for the prevention of foaming in lubricating oils comprising the addition thereto of a foam-preventing amount of an annydrous alkali metal or alkaline earth metal compound selected from the group consisting of oxides, sulfates and halides.
Claim 5
Dependent Claim
29 words
The lubrication oil composition of claim 1 wherein the said compound is selected from the group consisting of sodium sulfate, calcium chloride, calcium oxide, calcium sulfate, and mixtures thereof.
Claim 6
Dependent Claim
25 words
The method of claim 2 wherein the said compound is selected from the group sodium sulfate, calcium chloride, calcium oxide, calcium sulfate, and mixtures thereof.
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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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |