US2823183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filter oil
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-07-22
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Granted: 1958-02-11
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Expires: 1975-07-22
Abstract
No abstract record available.
Inventors
- 👤 Thorkild F Lonstrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:30
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2205/00; C10M2205/02; C10M2205/022; C10M2205/14; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/109; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN AIR FILTER OIL COMPRISING A BLEND OF MINERAL OIL HAVING A VISCOSITY AT 210*F. BETWEEN ABOUT 50 AND 60 SUS, AND CONTAINING FROM ABOUT 1.5 TO ABOUT 2.5% BY WEIGHT OF POLYETHYLENE HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM ABOUT 11,000 TO ABOUT 35,000 STAUDINGER, AND FROM ABOUT 0.05 TO ABOUT 0.2% OF POLYOXYETHYLENE SORBITAN MONO-OLEATE HAVING A VISCOSITY BETWEEN ABOUT 350 TO ABOUT 550 CP. AT 25*C., A SPECIFIC GRAVITY OF FROM ABOUT 1.0 TO ABOUT 1.15, A FLASH POINT OF FROM ABOUT 400 TO ABOUT 650*F. AND A FIRE POINT OF FROM ABOUT 480 TO ABOUT 675*F.
Claim 2
Dependent Claim
102 words
AN AIR FILTER OIL COMPRISING A BLEND OF MINERAL OIL HAVING A VISCOSITY AT 210*F. BETWEEN ABOUT 50 AND 60 SUS, AND CONTAINING FROM ABOUT 1.5 TO ABOUT 2.5% BY WEIGHT OF POLYETHYLENE HAVING A MOLECULAR WEIGHT WITHIN THE RANGE OF FROM ABOUT 11,000 TO ABOUT 35,000 STAUDINGER, AND FROM ABOUT 0.05 TO ABOUT 0.2% OF POLYOXYETHYLENE SORBITAN MONO-OLEATE HAVING A VISCOSITY BETWEEN ABOUT 350 TO ABOUT 550 CP. AT 25*C., A SPECIFIC GRAVITY OF FROM ABOUT 1.0 TO ABOUT 1.15, A FLASH POINT OF FROM ABOUT 400 TO ABOUT 650*F. AND A FIRE POINT OF FROM ABOUT 480 TO ABOUT 675*F.
References Cited (Backward Citations)
US2627938A
Cited
US2620044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |