Patent US2609931A successfully refreshed from Google Patents.
US2609931A
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Method of filtering
Assignee: Fram Corp
•
Filing: 1948-04-17
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Granted: 1952-09-09
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Expires: 1968-04-17
Abstract
No abstract record available.
Inventors
- 👤 Clarke A Rodman
- 👤 Norman L Tewksbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:12
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0016; B; B01; B01D; B01D15/00; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF ATTRACTING OR ADSORBING THE PYROLYTIC AND OXIDATION DECOMPOSITION PRODUCTS OF A HYDROCARBON OIL FORMING A CONTAMINANT IN SAID OIL FOR REMOVING SAID CONTAMINANT FROM SAID OIL, WHICH METHOD COMPRISES COLLECTING ON A FILTER MEDIA, CONTAMINANT FROM THE OIL WHICH HAS BEEN CONTACTED WITH A COMPOSITION CONTAINING AS THE ESSENTIAL INGREDIENT AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF THE FOLLOWING COMPOUNDS WHOSE GENERIC FORMULA ARE:
Claim 2
Independent Claim
69 words
A METHOD OF ATTRACTING OR ADSORBING THE PYROLYTIC AND OXIDATION DECOMPOSITION PRODUCTS OF A HYDROCARBON OIL FORMING A CONTAMINANT IN SAID OIL FOR REMOVING SAID CONTAMINANT FROM SAID OIL, WHICH METHOD COMPRISES COLLECTING ON A FILTER MEDIA, CONTAMINANT FROM THE OIL WHICH HAS BEEN CONTACTED WITH A COMPOSITION CONTAINING AS THE ESSENTIAL INGREDIENT AT LEAST ONE COMPOUND FROM THE GROUP CONSISTING OF THE FOLLOWING COMPOUNDS WHOSE GENERIC FORMULA ARE:
References Cited (Backward Citations)
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US2343430A
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US2343436A
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US2395400A
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US2419404A
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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) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |