US2837170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter lubricants
Assignee: Shell Development Co
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Filing: 1956-06-18
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Granted: 1958-06-03
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Expires: 1976-06-18
Abstract
No abstract record available.
Inventors
- 👤 Jack W Armstrong
- 👤 Harold A Woods
- 👤 Charles E Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
C; C10; C10M; C10M5/00; B; B01; B01D; B01D39/00; B01D39/10; B01D39/14; F; F02; F02M; F02M35/00; F02M35/02; F02M35/024; C10M2201/00; C10M2201/14; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/026; C10M2205/04; C10M2205/14; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/24; C10M2215/26; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A THIXOTROPIC LUBRICATING OIL COMPOSITION FOR COATING AIR FILTERS CONSISTING ESSENTIALLY OF A MINERAL LUBRICATING OIL CONTAINING FROM ABOUT 1% TO ABOUT 2% OF A WATERRESISTANT AMINATED OLEOPHILIC CLAY TREATED WITH PHOSPHORIC ACID, FROM ABOUT 0.5% TO ABOUT 2% OF AN ALKYLENE GLYCOL THE ALKYLENE RADICAL CONTAINING FROM 2 TO 6 CARBON ATOMS AND FROM ABOUT 0.5% TO ABOUT 5% OF AN OIL-SOLUBLE ADHESIVE OLEFIN HYDROCARBON POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 10,000 TO ABOUT 500,000, SAID POLYMER BEING DERIVED FROM AN OLEFIN MONOMER HAVING FROM 2 TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
96 words
A THIXOTROPIC LUBRICATING OIL COMPOSITION FOR COATING AIR FILTERS CONSISTING ESSENTIALLY OF A MINERAL LUBRICATING OIL CONTAINING FROM ABOUT 1% TO ABOUT 2% OF A WATERRESISTANT AMINATED OLEOPHILIC CLAY TREATED WITH PHOSPHORIC ACID, FROM ABOUT 0.5% TO ABOUT 2% OF AN ALKYLENE GLYCOL THE ALKYLENE RADICAL CONTAINING FROM 2 TO 6 CARBON ATOMS AND FROM ABOUT 0.5% TO ABOUT 5% OF AN OIL-SOLUBLE ADHESIVE OLEFIN HYDROCARBON POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE OF FROM ABOUT 10,000 TO ABOUT 500,000, SAID POLYMER BEING DERIVED FROM AN OLEFIN MONOMER HAVING FROM 2 TO 4 CARBON ATOMS.
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) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |