US2830956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic power transmission fluids
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-02-12
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Granted: 1958-04-15
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Expires: 1974-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jones I Wasson
- 👤 Douglas L Bonham
- 👤 Jr William C Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:54
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/287; C10M2207/289; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2209/086; C10M2219/00; C10M2219/02; C10M2219/022; C10M2219/024; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/12; C10M2225/00; C10M2225/04; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A HYDRAULIC TRANSMISSION FLUID HAVING A VISCOSITY IN THE RANGE OF 34 TO 60 SSU AT 210*F., A VISCOSITY INDEX ABOVE 130, A FLASH POINT ABOVE 300* F., AND A POUR POINT BELOW -20*F., AND COMPRISING 75-85 WT. PERCENT OF A MINERAL LUBRICATING OIL, 7-15 WT. PERCENT OF A SHEAR STABLE POLYMERIC VISCOSITY INDEX IMPROVER SELECTED FROM THE GROUP CONSISTING OF POLYBUTENE AND POLYMETHACRYLATES, 0.2-1 WT. PERCENT OF A VINYL ACETATE COPOLYMER POUR POINT DEPRESSOR UP TO 0.4 WT. PERCENT OF AN ALKYLATED PHENOL OXIDATION INHIBITOR 0.1-05 WT. PERCENT OF A SULFURIZEDOLE FINIC HYDROCARBON CORROSION INHIBITOR 0.5-4.0 WT. PERCENT OF A DETERGENT INHIBITOR SELECTED FROM THE GROUP CONSISTING OF METAL SALTS, OF ALKYLATED PHENOL SULFIDES AND PETROLEUM SULFONATES, 1-5 WT. PERCENT OF SULFURIZED SPERM OIL, AND 0.1 WT. PERCENT OF A FATTY ACID HAVING FROM 14 TO 22 CARBON ATOMS, SAID SPERM OIL AND FATTY ACID TOTALLING 1.5-6 WT. PERCENT OF SAID FLUID.
Claim 2
Dependent Claim
153 words
A HYDRAULIC TRANSMISSION FLUID HAVING A VISCOSITY IN THE RANGE OF 34 TO 60 SSU AT 210*F., A VISCOSITY INDEX ABOVE 130, A FLASH POINT ABOVE 300* F., AND A POUR POINT BELOW -20*F., AND COMPRISING 75-85 WT. PERCENT OF A MINERAL LUBRICATING OIL, 7-15 WT. PERCENT OF A SHEAR STABLE POLYMERIC VISCOSITY INDEX IMPROVER SELECTED FROM THE GROUP CONSISTING OF POLYBUTENE AND POLYMETHACRYLATES, 0.2-1 WT. PERCENT OF A VINYL ACETATE COPOLYMER POUR POINT DEPRESSOR UP TO 0.4 WT. PERCENT OF AN ALKYLATED PHENOL OXIDATION INHIBITOR 0.1-05 WT. PERCENT OF A SULFURIZEDOLE FINIC HYDROCARBON CORROSION INHIBITOR 0.5-4.0 WT. PERCENT OF A DETERGENT INHIBITOR SELECTED FROM THE GROUP CONSISTING OF METAL SALTS, OF ALKYLATED PHENOL SULFIDES AND PETROLEUM SULFONATES, 1-5 WT. PERCENT OF SULFURIZED SPERM OIL, AND 0.1 WT. PERCENT OF A FATTY ACID HAVING FROM 14 TO 22 CARBON ATOMS, SAID SPERM OIL AND FATTY ACID TOTALLING 1.5-6 WT. PERCENT OF SAID FLUID.
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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) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |