US2875899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filter coating
Assignee: Motors Liquidation Co
•
Filing: 1952-09-25
•
Granted: 1959-03-03
•
Expires: 1972-09-25
Abstract
No abstract record available.
Inventors
- 👤 Norton James Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:13
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01D35/00; B01D37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
THE METHOD OF PURIFYING LUBRICATING OILS BY FILTRATION WHICH COMPRISES PASSING THE OIL TO BE FILTERED THROUGH A FILTER MEDIUM HAVING A COATING OF A STABILIZED, HEATBODIED, SUBSTANTIALLY NON-OXIDIZED OIL SELECTED FROM THE CLASS OF DRYING AND SEMI-DRYING OILS, SAID HEAT-BODIED OIL HAVING A GARDNER-HOLDT VISCOSITY AT 25*C. OF BETWEEN Z-2 AND ITS GELATION POINT.
Claim 2
Independent Claim
55 words
THE METHOD OF PURIFYING LUBRICATING OILS BY FILTRATION WHICH COMPRISES PASSING THE OIL TO BE FILTERED THROUGH A FILTER MEDIUM HAVING A COATING OF A STABILIZED, HEATBODIED, SUBSTANTIALLY NON-OXIDIZED OIL SELECTED FROM THE CLASS OF DRYING AND SEMI-DRYING OILS, SAID HEAT-BODIED OIL HAVING A GARDNER-HOLDT VISCOSITY AT 25*C. OF BETWEEN Z-2 AND ITS GELATION POINT.
References Cited (Backward Citations)
US1791057A
Cited
US1006070A
Cited
US1434154A
Cited
US1547712A
Cited
US1987467A
Cited
US1720992A
Cited
US1989728A
Cited
US2019241A
Cited
US2041728A
Cited
US2103572A
Cited
US2214326A
Cited
US2317487A
Cited
US2343428A
Cited
US2343429A
Cited
US2435734A
Cited
US2411660A
Cited
US2453188A
Cited
GB665994A
Cited
US2607745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |