Patent US4513606A successfully refreshed from Google Patents.
US4513606A
Expired / Lapsed
US
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Surfactant monitor for aviation fuel filter/separators
Assignee: Mobil Oil AS
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Filing: 1982-08-11
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Granted: 1985-04-30
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Expires: 2002-08-11
Abstract
Abstract A method and apparatus is provided for indicating the effectiveness of aviation fuel filters and separators wherein a small Teflon monitor is installed in conjunction with paper separator elements and is periodically removed to test the surfactant level within the aviation fuel filters and separators.
Inventors
- 👤 Donald L. Rhynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/0806; B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; B01D17/04; B01D17/045; B01D17/08; B01D17/10; B01D29/00; B01D29/50; B01D29/52; B01D36/00; B01D36/003; B01D36/006; F; F02; F02M; F02M37/00; F02M37/22; F02M37/24; F02M37/32; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438; G01N2015/0023; G01N2015/003; G01N2015/084; G01N33/00; G01N33/26; G01N33/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
66 words
In a filter/separator unit having two stages for separating moisture and filtering particulate matter the improvement comprising: a replaceable cylindrical element for monitoring cumulative saturation of separating elements used to separate moisture from aviation fuel, constructed of a material readily testable for surfactant contamination, said cylindrical element adapted to be replaced in the unit whenever said separating elements have a moisture content below a predetermined level.
Claim 2
Dependent Claim
66 words
In a filter/separator unit having two stages for separating moisture and filtering particulate matter the improvement comprising: a replaceable cylindrical element for monitoring cumulative saturation of separating elements used to separate moisture from aviation fuel, constructed of a material readily testable for surfactant contamination, said cylindrical element adapted to be replaced in the unit whenever said separating elements have a moisture content below a predetermined level.
Claim 3
Dependent Claim
41 words
A surfactant monitor comprising: a generally cylindrical shaped element having a length approximately equal to its diameter constructed of a material testable for cumulative surfactant contamination, said element adapted for continued use whenever said surfactant contamination is below a predetermined level.
Claim 4
Dependent Claim
41 words
A surfactant monitor comprising: a generally cylindrical shaped element having a length approximately equal to its diameter constructed of a material testable for cumulative surfactant contamination, said element adapted for continued use whenever said surfactant contamination is below a predetermined level.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |