Patent US2296340A successfully refreshed from Google Patents.
Patent US3228527A successfully refreshed from Google Patents.
US3228527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water separating fuel filter
Assignee: Maremont Corp
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Filing: 1962-03-05
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Granted: 1966-01-11
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Robert W Mcpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:39
CPC Classifications
B; B01; B01D; B01D36/00; B01D36/003; B01D17/00; B01D17/02; B01D17/04; B01D17/045; B01D17/08; B01D17/10; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/50; B01D29/56; B01D29/58; B01D2201/00; B01D2201/04; B01D2201/0461; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A COMBINED FILTERING AND WEARING SEPARATING CARTRIDGE FOR HYDROCARBON LIQUIDS, SAID CARTIDGE HAVING A GENERALLY CYLINDRICAL SHAPE AND COMPRISING: A FIRST, RELATIVELY COARSE FILTERING STAGE FORMED BY A LAYER OF ABSORBENT MATERIAL; A SECOND RELATIVELY FINE FILTERING STAGE FORMED BY A LAYER OF NON-WOVEN FABRIC MATERIAL ADJACENT SAID FIRST LAYER; SPACING MEANS FOR MAINTAINING A PREDETERMINED SEPARATION BETWEEN SAID FIRST AND SECOND LAYERS; A THIRD WATER-SEPARATING STAGE COMPRISING A LAYER OF COALESCING MATERIAL LYING DIRECTLY ADJACENT TO SAID SECOND LAYER; A FOURTH LAYER OF POROUS MATERIAL HAVING A MULTIPILICITY OF PASSAGES AND LOCATED ADJACENT SAID THIRD LAYER; A PERVIOUS WALL MEMBER ADJACENT SAID FOURTH LAYER; A PERVIOUS WATER-DROPLET BARRIER FORMED FROM A FIFTH LAYER OF POROUS MATERIAL
Claim 2
Dependent Claim
117 words
A COMBINED FILTERING AND WEARING SEPARATING CARTRIDGE FOR HYDROCARBON LIQUIDS, SAID CARTIDGE HAVING A GENERALLY CYLINDRICAL SHAPE AND COMPRISING: A FIRST, RELATIVELY COARSE FILTERING STAGE FORMED BY A LAYER OF ABSORBENT MATERIAL; A SECOND RELATIVELY FINE FILTERING STAGE FORMED BY A LAYER OF NON-WOVEN FABRIC MATERIAL ADJACENT SAID FIRST LAYER; SPACING MEANS FOR MAINTAINING A PREDETERMINED SEPARATION BETWEEN SAID FIRST AND SECOND LAYERS; A THIRD WATER-SEPARATING STAGE COMPRISING A LAYER OF COALESCING MATERIAL LYING DIRECTLY ADJACENT TO SAID SECOND LAYER; A FOURTH LAYER OF POROUS MATERIAL HAVING A MULTIPILICITY OF PASSAGES AND LOCATED ADJACENT SAID THIRD LAYER; A PERVIOUS WALL MEMBER ADJACENT SAID FOURTH LAYER; A PERVIOUS WATER-DROPLET BARRIER FORMED FROM A FIFTH LAYER OF POROUS MATERIAL
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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) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |