US3445376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrofilter
Assignee: RICHARD W STENZEL
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Filing: 1966-12-01
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Granted: 1969-05-20
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Expires: 1986-12-01
Abstract
No abstract record available.
Inventors
- 👤 Richard W Stenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:02
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/06; B03; B03C; B03C5/00; B03C5/02; B03C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
AN ELECTROFILTER FOR THE REMOVAL OF LIQUID AND SOLID PARTICLES FROM OILS OF RELATIVELY LOW CONDUCTIVITIES, COMPRISING A SPIRALLY WRAPPED ASSEMBLY OF TWO OPPOSITELY CHARGED ELECTRODES UTILIZING A PLIABLE POROUS ORGANIC FILTER MEDIUM TO INSULATE AND SEPARATE THE ELECTRODES FROM EACH OTHER, SAID ELECTRODES BEING CONSTRUCTED OF METALLIC FOIL SUFFICIENTLY THIN AND FLEXIBLE SO AS TO EXERT ONLY SLIGHT DISTORTING FORCES ON THE FILTER MEDIUM IN THE SPIRALLY WRAPPED STATE, SAID FILTER MEDIUM COMPLETELY OCCUPYING THE INTERELECTRODE SPACE AND EXTENDING LONGITUDINALLY BEYOND THE ELECTRODES TO PROTECT THEM FROM EXTERNAL HANDLING DISTORTIONS AND CONTACT WITH EACH OTHER AND WITH EXTERNAL OBJECTS; CONDUCTING MEANS FOR ATTACHING ONE OF SAID ELECTRODES TO AN ELECTRIC POWER SOURCE AND THE OTHER TO GROUND; MEANS FOR ESTABLISHING A HIGH UNIDIRECTIONAL VOLTAGE GRADIENT BETWEEN SAID ELECTRODES, ENCASING MEANS FOR SAID ASSEMBLY HAVING APPROPRIATE INLET AND OUTLET PASSAGES, AND SEALING MEANS FOR PERMITTING FLOW OF SAID OILS LONGITUDINALLY THROUGH SAID ASSEMBLY IN A NON-BYPASSING MANNER.
Claim 2
Dependent Claim
157 words
AN ELECTROFILTER FOR THE REMOVAL OF LIQUID AND SOLID PARTICLES FROM OILS OF RELATIVELY LOW CONDUCTIVITIES, COMPRISING A SPIRALLY WRAPPED ASSEMBLY OF TWO OPPOSITELY CHARGED ELECTRODES UTILIZING A PLIABLE POROUS ORGANIC FILTER MEDIUM TO INSULATE AND SEPARATE THE ELECTRODES FROM EACH OTHER, SAID ELECTRODES BEING CONSTRUCTED OF METALLIC FOIL SUFFICIENTLY THIN AND FLEXIBLE SO AS TO EXERT ONLY SLIGHT DISTORTING FORCES ON THE FILTER MEDIUM IN THE SPIRALLY WRAPPED STATE, SAID FILTER MEDIUM COMPLETELY OCCUPYING THE INTERELECTRODE SPACE AND EXTENDING LONGITUDINALLY BEYOND THE ELECTRODES TO PROTECT THEM FROM EXTERNAL HANDLING DISTORTIONS AND CONTACT WITH EACH OTHER AND WITH EXTERNAL OBJECTS; CONDUCTING MEANS FOR ATTACHING ONE OF SAID ELECTRODES TO AN ELECTRIC POWER SOURCE AND THE OTHER TO GROUND; MEANS FOR ESTABLISHING A HIGH UNIDIRECTIONAL VOLTAGE GRADIENT BETWEEN SAID ELECTRODES, ENCASING MEANS FOR SAID ASSEMBLY HAVING APPROPRIATE INLET AND OUTLET PASSAGES, AND SEALING MEANS FOR PERMITTING FLOW OF SAID OILS LONGITUDINALLY THROUGH SAID ASSEMBLY IN A NON-BYPASSING MANNER.
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |