US4164475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-grade 80W-140 gear oil
Assignee: Standard Oil Co
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Filing: 1975-05-09
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Granted: 1979-08-14
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Expires: 1995-05-09
Abstract
Abstract A multi-grade 80W-140 gear oil is described which is composed of certain mineral-oil stocks, a wear additive, a V.I. improver, a dispersant polymer and optionally a seal-swell agent.
Inventors
- 👤 Richard D. Schieman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:45
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M169/048; C10M101/00; C10M101/02; C10M129/00; C10M129/02; C10M129/68; C10M129/72; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M145/00; C10M145/02; C10M145/10; C10M145/12; C10M145/14; C10M149/00; C10M149/02; C10M149/06; C10M2203/00; C10M2203/10; C10M2203/1006; C10M2203/102; C10M2203/1025; C10M2203/104; C10M2203/1045; C10M2203/106; C10M2203/1065; C10M2203/108; C10M2203/1085; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/285; C10M2207/286; C10M2207/34; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2217/00; C10M2217/02; C10M2217/022; C10M2217/024; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10M2223/12; C10M2223/121; C10M2225/00; C10M2225/04; C10M2225/041; C10N; C10N2040/00; C10N2040/02; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
In a multi-grade gear oil composition comprising a major proportion of mineral lubricating oil, 5-6 volume percent sulfur- and phosphorous-containing wear additive, 16.6-18.6 volume percent V.I. improver, and 0-2.7 volume percent seal-swell agent, the improvement comprising using as the oil a petroleum-oil stock composed of 20-23 volume percent of a 5.0 centistokes at 210° F. oil, 24-25 volume percent 14.0 centistokes at 210° F. oil, and 26-30 volume percent 25.0 centistokes at 210° F. oil, and from 0.1 to 1.5 volume percent of a dispersant polymer which is an alkyl methacrylate copolymer which has been grafted with a dialkyl amino methacrylate monomer.
Claim 2
Dependent Claim
102 words
In a multi-grade gear oil composition comprising a major proportion of mineral lubricating oil, 5-6 volume percent sulfur- and phosphorous-containing wear additive, 16.6-18.6 volume percent V.I. improver, and 0-2.7 volume percent seal-swell agent, the improvement comprising using as the oil a petroleum-oil stock composed of 20-23 volume percent of a 5.0 centistokes at 210° F. oil, 24-25 volume percent 14.0 centistokes at 210° F. oil, and 26-30 volume percent 25.0 centistokes at 210° F. oil, and from 0.1 to 1.5 volume percent of a dispersant polymer which is an alkyl methacrylate copolymer which has been grafted with a dialkyl amino methacrylate monomer.
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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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |