Patent US3883328A successfully refreshed from Google Patents.
US3883328A
Expired / Lapsed
US
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Carbon fiber electrodes for electrical precipitators
Assignee: Individual
•
Filing: 1973-11-29
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Granted: 1975-05-13
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Expires: 1993-11-29
Abstract
Abstract A collecting electrode comprised of a batt of carbon fibers is used to remove sub-micron size dispersoids from gases treated in an electrical precipitator. One form of the carbon fiber electrode provides for the thermo-oxidative removal of some types of organic dispersoids from the electrode.
Inventors
- 👤 Raymond G Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:35
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/40; B03C3/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
74 words
A COLLECTING ELECTRODE TO REMOVE PARTICULATE MATERIALS FROM GASES BY ELECTRICAL PRECIPITATION COMPRISING: A MASS OF CARBON FIBERS WITH AN APPARENT DENSITY OF 0.02 TO 0.01 GRAMS PER CUBIC CENTIMETER, WITH AVERAGE INDIVIDUAL FIBERS HAVING AN ELECTRICAL RESISTIVITY OF 2 TO 13 X 10**-4 OHM-CENTIMETERS, AN AXIAL FIBER MODULI GREATER THAN 10 X 10**6 PSI, A DENSITY GREATER THAN 1.7 GRAMS PER CUBIC CENTIMETER, AND AN EQUIVALENT DIAMETER OF 6 TO 12 MICRONS; AND
Claim 2
Dependent Claim
74 words
A COLLECTING ELECTRODE TO REMOVE PARTICULATE MATERIALS FROM GASES BY ELECTRICAL PRECIPITATION COMPRISING: A MASS OF CARBON FIBERS WITH AN APPARENT DENSITY OF 0.02 TO 0.01 GRAMS PER CUBIC CENTIMETER, WITH AVERAGE INDIVIDUAL FIBERS HAVING AN ELECTRICAL RESISTIVITY OF 2 TO 13 X 10**-4 OHM-CENTIMETERS, AN AXIAL FIBER MODULI GREATER THAN 10 X 10**6 PSI, A DENSITY GREATER THAN 1.7 GRAMS PER CUBIC CENTIMETER, AND AN EQUIVALENT DIAMETER OF 6 TO 12 MICRONS; AND
Claim 3
Dependent Claim
53 words
The collecting electrode of claim 1 wherein the carbon fiber mass is rigidized by impregnating the carbon fiber mass with a carbon char yielding resin in liquid form in sufficient quantity to yield a carbon char on pyrolysis in the amount of 2 to 10 weight per cent of the carbon fiber mass.
Claim 4
Dependent Claim
42 words
The collecting electrode of claim 2 wherein a means of controllable electrical resistant heating of the carbon fiber mass is provided by applying an alternating or direct current potential across the electrode by electrical contacts at the opposing edges of the electrode.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |