Patent US3805918A successfully refreshed from Google Patents.
US3805918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mist oil lubrication process
Assignee: Chevron USA Inc
•
Filing: 1972-07-19
•
Granted: 1974-04-23
•
Expires: 1992-07-19
Abstract
Abstract Undesirable stray mist in mist oil lubrication is reduced to low levels by means of a lubrication process utilizing a mist oil composition containing as a stray mist suppressant from 0.001 to 2 percent by weight of certain oil-soluble polyolefins of viscosity average molecular weight greater than 5,000.
Inventors
- 👤 K Altgelt
- 👤 C Thut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:34
CPC Classifications
C; C10; C10M; C10M143/00; C10M143/02; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/02; C10M2205/024; C10M2205/026; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/10; C10M2209/103; C10M2209/109; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/045; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/02; C10N2050/00; C10N2050/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
28 words
The process of claim 1 wherein the copolymer is a copolymer of ethylene and a C3-C6 monomeric mono-olefin, said copolymer consisting of 40- 80 mol percent of ethylene.
Claim 2
Dependent Claim
24 words
The process of claim 1 wherein the copolymer is a copolymer of ethylene and propylene, said copolymer consisting of 40-80 mol percent of ethylene.
Claim 3
Dependent Claim
17 words
The process of claim 3 in which the percentage of stray mist is less than 0.5 percent.
Claim 4
Dependent Claim
62 words
In a method for lubricating a system wherein a lubricating oil is converted into a mist lubricant and the mist lubricant contacted with parts desired to be lubricated, the improvement for suppressing stray mist which comprises adding to said lubricating oil from 0.001 to 0.1 weight percent of an ethylene-propylene copolymer having a viscosity average molecular weight between about 5,000 and 300,000.
Claim 5
Dependent Claim
26 words
The method defined in claim 5 wherein a sufficient amount of said copolymer is added to reduce the level of stray mist below about 0.5 percent.
References Cited (Backward Citations)
US3112297A
Cited
US3265622A
Cited
US3389087A
Cited
GB1099450A
Cited
US3510425A
Cited
US3551336A
Cited
US3676521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-22 | 1977-10-22 | 1978-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-22 | 1981-10-22 | 1982-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-22 | 1985-10-22 | 1986-04-23 | $7700.00 | Window Closed / Lapsed |