US2647079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of insulated condenser electrodes
Assignee: Sprague Electric Co
•
Filing: 1948-06-03
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Granted: 1953-07-28
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Expires: 1968-06-03
Abstract
No abstract record available.
Inventors
- 👤 Burnham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:03
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR PRODUCING INSULATED CONDENSER ELECTRODES WHICH COMPRISES ANODICALLY OXIDIZING A FOIL OF A METAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM, TANTALUM AND TITANIUM IN A FILM FORMING ELECTROLYTE TO FORM ON THE FOIL A POROUS OXIDE FILM HAVING A THICKNESS OF FROM 1 TO 400 MICRONS, WASHING THE POROUS OXIDE FILM WITH A LIQUID WHICH IS A SOLVENT FOR THE ELECTROLYTE TO FLUSH AWAY THE ELECTROLYTE, CONTACTING THE WASHED AND UNDRIED FILM WITH A SUSPENSION OF PARTICLES OF A POLYTETRAHALOETHYLENE RESIN IN A VEHICLE SOLUBLE IN TH WASHING LIQUID TO IMPREGNATE THE PORES OF THE FILM WITH SUCH RESIN PARTICLES, DRYING THE IMPREGNATED FILM AND SINTERING THE RESIN PARTICLES TOGETHER.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PRODUCING INSULATED CONDENSER ELECTRODES WHICH COMPRISES ANODICALLY OXIDIZING A FOIL OF A METAL SELECTED FROM THE CLASS CONSISTING OF ALUMINUM, TANTALUM AND TITANIUM IN A FILM FORMING ELECTROLYTE TO FORM ON THE FOIL A POROUS OXIDE FILM HAVING A THICKNESS OF FROM 1 TO 400 MICRONS, WASHING THE POROUS OXIDE FILM WITH A LIQUID WHICH IS A SOLVENT FOR THE ELECTROLYTE TO FLUSH AWAY THE ELECTROLYTE, CONTACTING THE WASHED AND UNDRIED FILM WITH A SUSPENSION OF PARTICLES OF A POLYTETRAHALOETHYLENE RESIN IN A VEHICLE SOLUBLE IN TH WASHING LIQUID TO IMPREGNATE THE PORES OF THE FILM WITH SUCH RESIN PARTICLES, DRYING THE IMPREGNATED FILM AND SINTERING THE RESIN PARTICLES TOGETHER.
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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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |