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US4075113A
Expired / Lapsed
US
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Grease composition
Assignee: Labofina SA
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Filing: 1976-06-25
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Granted: 1978-02-21
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Expires: 1996-06-25
Abstract
Abstract A lubricating grease comprised of 2 to 8% by weight of an aluminium fatty acid soap, 25 to 98% by weight of a polymer of a non hydrogenated polyisobutylene having a mean molecular weight ranging from 300 to 2500, 0.2% polyisobutylene having a mean molecular weight higher than 100,000, and about 2 to 58% of lubricating oil.
Inventors
- 👤 Guy Camille Van Doorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:36
CPC Classifications
C; C10; C10M; C10M169/00; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/282; C10M2207/34; C10N; C10N2010/00; C10N2010/06; C10N2020/00; C10N2020/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A lubricating grease composition consisting essentially of 2 to 8% by weight of an aluminum fatty acid soap, 25 to 98% by weight of non-hydrogenated polyisobutylene having a mean molecular weight ranging from 300 to 2500, 2 to 58% mineral lubricating oil, and 0.2% polysobutylene having a mean molecular weight higher than 100,000, and also having a worked penetration in the range of about 285 to 340 and a wear index in the range of about 0.63 to 0.74.
Claim 2
Dependent Claim
79 words
A lubricating grease composition consisting essentially of 2 to 8% by weight of an aluminum fatty acid soap, 25 to 98% by weight of non-hydrogenated polyisobutylene having a mean molecular weight ranging from 300 to 2500, 2 to 58% mineral lubricating oil, and 0.2% polysobutylene having a mean molecular weight higher than 100,000, and also having a worked penetration in the range of about 285 to 340 and a wear index in the range of about 0.63 to 0.74.
Claim 3
Dependent Claim
35 words
The lubricating grease composition of claim 1 wherein said grease comprises 35 to 97% of a non-hydrogenated polyisobutylene having a mean molecular weight ranging from 300 to 2500, and 2 to 56% of mineral oil.
Claim 4
Dependent Claim
44 words
A lubricating grease as defined in claim 2 wherein the aluminum soap is in the range of 3 to 8%, the non-hydrogenated polyisobutylene is in the range of 35 to 87% and the lubricating mineral oil is in the range of 10 to 48%.
Claim 5
Dependent Claim
26 words
The lubricating grease of claim 1 wherein the aluminum soap is an aluminum soap of a carboxylic fatty acid containing from 12 to 20 carbon atoms.
Claim 6
Dependent Claim
141 words
A process for the manufacture of lubricating greases which comprise: dispersing, at 15°-50° C 2 to 8% by weight, based on the total composition, of aluminum fatty acid soap, into 10 to 50% by weight of a non-hydrogenated polymer of polyisobutylene said polymer having a mean molecular weight of between 300 and 2500, progressively heating said dispersion, adding 2 to 58% by weight of mineral lubricating oil when the temperature reaches 90° to 110° C, slowly adding 0.2% polyisobutylene having a mean molecular weight higher than 100,000 and 15 to 48% by weight of a polymer of non-hydrogenated isobutylene, said polymer having a mean molecular weight of between 300 and 2500 when the temperature reaches 150° to 180° C, and maintaining such temperature during the addition of the polymer, cooling the mixture and homogenizing said mixture at 10 to 35° C.
Claim 7
Dependent Claim
141 words
A process for the manufacture of lubricating greases which comprise: dispersing, at 15°-50° C 2 to 8% by weight, based on the total composition, of aluminum fatty acid soap, into 10 to 50% by weight of a non-hydrogenated polymer of polyisobutylene said polymer having a mean molecular weight of between 300 and 2500, progressively heating said dispersion, adding 2 to 58% by weight of mineral lubricating oil when the temperature reaches 90° to 110° C, slowly adding 0.2% polyisobutylene having a mean molecular weight higher than 100,000 and 15 to 48% by weight of a polymer of non-hydrogenated isobutylene, said polymer having a mean molecular weight of between 300 and 2500 when the temperature reaches 150° to 180° C, and maintaining such temperature during the addition of the polymer, cooling the mixture and homogenizing said mixture at 10 to 35° C.
Claim 8
Dependent Claim
24 words
The process of claim 5 wherein said aluminum soap is an aluminum soap of a carboxylic fatty acid containing 12 to 20 carbon atoms.
Claim 9
Dependent Claim
29 words
The process of claim 5 wherein said aluminum soap is present in quantity of 2 to 15% and said mineral oil is present in quantity of 2 to 56%.
Claim 10
Dependent Claim
33 words
The lubricating grease composition of claim 1, wherein said non-hydrogenated polyisobutylene is present as a mixture of substantial portions of high mean molecular weight non-hydrogenated polyisobutylene and low mean molecular weight non-hydrogenated polyisobutylene.
References Cited (Backward Citations)
US2084501A
Cited
US2526986A
Cited
US3083160A
Cited
US3100808A
Cited
US3285851A
Cited
US3663726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |