US2839159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubrication of industrial machinery
Assignee: Gulf Oil Corp
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Filing: 1953-12-14
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Granted: 1958-06-17
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Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 John G Peters
- 👤 Jr Claude R Summers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:06
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/007; F01D25/18; F16; F16N; F16N15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN THE LUBRICATION OF THE BEARINGS OF INDUSTRIAL MACHINERY OF THE TYPE OF STEAM TURBINES AND STEAM-HEATED DRYING ROLLS, WHEREIN THE BEARINGS TEND TO BECOME HEATED AND ARE COOLED AND LUBRICATED BY THE CIRCULATION OF LARGE QUANTITIES OF LUBRICATING OIL PUMPED THROUGH THE BEARINGS, THEREBY CONTAMINATING THE OIL WITH WATER AND FORMING ACIDIC OXIDATION PRODUCTS OF THE OIL, THE METHOD OF PROLONGING THE SERVICE LIFE OF THE LUBRICATING OIL AND REDUCING THE CORROSIVE EFFECTS OF THE ACIDIC OXIDATION PRODUCTS OF THE OIL WHICH COMPRISES IMMERSING METALLIC MAGNESIUM IN THE CIRCULATING OIL, SAID OIL CONTAINING 2,6-DITERTIARYBUTYL-4-METHYL PHENOL, THE METALLIC MAGNESIUM BEING ELECTRICALLY INSULATED FROM THE METALS OF THE CIRCULATING LUBRICATING OIL SYSTEM.
Claim 2
Dependent Claim
111 words
IN THE LUBRICATION OF THE BEARINGS OF INDUSTRIAL MACHINERY OF THE TYPE OF STEAM TURBINES AND STEAM-HEATED DRYING ROLLS, WHEREIN THE BEARINGS TEND TO BECOME HEATED AND ARE COOLED AND LUBRICATED BY THE CIRCULATION OF LARGE QUANTITIES OF LUBRICATING OIL PUMPED THROUGH THE BEARINGS, THEREBY CONTAMINATING THE OIL WITH WATER AND FORMING ACIDIC OXIDATION PRODUCTS OF THE OIL, THE METHOD OF PROLONGING THE SERVICE LIFE OF THE LUBRICATING OIL AND REDUCING THE CORROSIVE EFFECTS OF THE ACIDIC OXIDATION PRODUCTS OF THE OIL WHICH COMPRISES IMMERSING METALLIC MAGNESIUM IN THE CIRCULATING OIL, SAID OIL CONTAINING 2,6-DITERTIARYBUTYL-4-METHYL PHENOL, THE METALLIC MAGNESIUM BEING ELECTRICALLY INSULATED FROM THE METALS OF THE CIRCULATING LUBRICATING OIL SYSTEM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |