Patent US1247863A successfully refreshed from Google Patents.
Patent JPS5979031A successfully refreshed from Google Patents.
US2725352A
Expired / Lapsed
US
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Methods of and apparatus for dissolving surface projections, electropolishing and passivating metallic tapes
Assignee: AT&T Inc
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Filing: 1950-07-21
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Granted: 1955-11-29
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Expires: 1970-07-21
Abstract
No abstract record available.
Inventors
- 👤 Herman R Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:57
CPC Classifications
C; C25; C25F; C25F7/00; C25F3/00; C25F3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF DISSOLVING SURFACE PROJECTIONS, ELECTROPOLISHING AND PASSIVATING METALLIC TAPES HAVING SERRATED EDGES, WHICH COMPRISES ADVANCING A FILAMENTARY CATHODE LONGITUDINALLY ALONG A PREDETERMINED PATH THROUGH AN ELECTROLYTIC BATH, ADVANCING SUCH A METALLIC TAPE LONGITUDINALLY THROUGH THE BATH ALONG A PATH WHICH PROGRESSIVELY APPRAOCHES THE PATH OF THE CATHODE FROM THE ENTRANCE END TO THE EXIT END OF THE BATH, MASKING THE EDGES OF THE TAPE WITH ELECTRICAL INSULATING MATERIAL TO PREVENT ELECTROLYTIC ACTION ON THE SERRATED PORTIONS THEREOF, AND
Claim 2
Independent Claim
80 words
THE METHOD OF DISSOLVING SURFACE PROJECTIONS, ELECTROPOLISHING AND PASSIVATING METALLIC TAPES HAVING SERRATED EDGES, WHICH COMPRISES ADVANCING A FILAMENTARY CATHODE LONGITUDINALLY ALONG A PREDETERMINED PATH THROUGH AN ELECTROLYTIC BATH, ADVANCING SUCH A METALLIC TAPE LONGITUDINALLY THROUGH THE BATH ALONG A PATH WHICH PROGRESSIVELY APPRAOCHES THE PATH OF THE CATHODE FROM THE ENTRANCE END TO THE EXIT END OF THE BATH, MASKING THE EDGES OF THE TAPE WITH ELECTRICAL INSULATING MATERIAL TO PREVENT ELECTROLYTIC ACTION ON THE SERRATED PORTIONS THEREOF, AND
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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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |