US3884820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grease composition
Assignee: Standard Oil Co
•
Filing: 1971-04-19
•
Granted: 1975-05-20
•
Expires: 1991-04-19
Abstract
Abstract A mineral oil grease which is resistant to separation by centrifugal force is provided by using as the sole thickening agent either polyethylene having a number average molecular weight of from about 1,500 to about 3,000 or a combination of said polyethylene with a small amount of a lithium higher fatty acid soap.
Inventors
- 👤 James E Miller
- 👤 Reuben A Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:31
CPC Classifications
C; C10; C10M; C10M5/00; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/16; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2010/08; C10N2020/00; C10N2020/01; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A GREASE RESISTANT TO SEPARATION BY CENTRIFUGAL FORCE CONSISTING ESSENTIALLY OF A MINERAL LUBRICATING OIL HAVING A VISCOSITY IN THE RANGE OF FROM ABOUT 130 TO ABOUT 200 SSU AT 210*F CONTAINING AS THE SOLE THICKENING AGENT FOR SAID OIL EITHER (A) FROM ABOUT 6 TO ABOUT 10 WEIGHT PER CENT OF POLYETHYLENE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,500 TO ABOUT 3,000 OR (B) FROM ABOUT 6.5 TO ABOUT 12 WEIGHT PER CENT OF A MIXTURE CONSISTING OF (I) FROM ABOUT 6 TO ABOUT 10 WEIGHT PER CENT OF POLYETHYLENE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,500 TO ABOUT 3,000 AND (II) FROM ABOUT 0.5 TO ABOUT 2 WEIGHT PER CENT OF A LITHIUM HIGHER FATTY ACID SOAP.
Claim 2
Dependent Claim
131 words
A GREASE RESISTANT TO SEPARATION BY CENTRIFUGAL FORCE CONSISTING ESSENTIALLY OF A MINERAL LUBRICATING OIL HAVING A VISCOSITY IN THE RANGE OF FROM ABOUT 130 TO ABOUT 200 SSU AT 210*F CONTAINING AS THE SOLE THICKENING AGENT FOR SAID OIL EITHER (A) FROM ABOUT 6 TO ABOUT 10 WEIGHT PER CENT OF POLYETHYLENE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,500 TO ABOUT 3,000 OR (B) FROM ABOUT 6.5 TO ABOUT 12 WEIGHT PER CENT OF A MIXTURE CONSISTING OF (I) FROM ABOUT 6 TO ABOUT 10 WEIGHT PER CENT OF POLYETHYLENE HAVING A NUMBER AVERAGE MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 1,500 TO ABOUT 3,000 AND (II) FROM ABOUT 0.5 TO ABOUT 2 WEIGHT PER CENT OF A LITHIUM HIGHER FATTY ACID SOAP.
Claim 3
Dependent Claim
15 words
The composition of claim 1 wherein the molecular weight of said polyethylene is about 2,000.
Claim 4
Dependent Claim
15 words
The composition of claim 2 wherein said thickening agent is about 7 weight percent polyethylene.
Claim 5
Dependent Claim
28 words
The composition of claim 2 wherein said thickening agent is a mixture of about 7 weight percent polyethylene and about 0.85 to about 0.9 weight percent lithium soap.
Claim 6
Dependent Claim
26 words
The composition of claim 4 wherein said lithium soap is a lithium salt of a mixture of hydrogenated castor oil and hydrogenated fish oil fatty acids.
Claim 7
Dependent Claim
33 words
In the operation of centrifugal gear couplings wherein a solid lubricant is used to lubricate the gears in said coupLing, the improvement comprising using as said lubricant the grease composition of claim 1.
Claim 8
Dependent Claim
33 words
In the operation of centrifugal gear couplings wherein a solid lubricant is used to lubricate the gears in said coupling, the improvement comprising using as said luubricant the grease composition of claim 2.
Claim 9
Dependent Claim
32 words
In the operation of centrifugal gear couplings wherein a solid lubricant is used to lubricate the gears in said coupling, the improvement comprising using as said lubricant the composition of claim 3.
Claim 10
Dependent Claim
32 words
In the operation of centrifugal gear couplings wherein a solid lubricant is used to lubricate the gears in said coupling, the improvement comprising using as said lubricant the composition of claim 4.
Claim 11
Dependent Claim
32 words
In the operation of centrifugal gear couplings wherein a solid lubricant is used to lubricate the gears in said coupling, the improvement comprising using as said lubricant the composition of claim 5.
References Cited (Backward Citations)
US2627938A
Cited
US2833718A
Cited
US3083160A
Cited
US3290244A
Cited
US3271311A
Cited
US3293179A
Cited
US3396108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |