US2725355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electropolishing metallic articles
Assignee: AT&T Inc
•
Filing: 1950-07-21
•
Granted: 1955-11-29
•
Expires: 1970-07-21
Abstract
No abstract record available.
Inventors
- 👤 Alvin N Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:08
CPC Classifications
C; C25; C25F; C25F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN APPARATUS FROM ELECTROPOLISHING ARTICLES, WHICH COMPRISES A TANK CONTAINING AN ELECTROLYTIC BATH, A CATHODE EXTENDING GENERALLY ACROSS THE TANK, MEANS FOR ADVANCING AN ARTICLE TO BE ELECTROPOLISHED THROUGH THE TANK ALONG A PATH SUBSTANTIALLY PARALLEL TO THE CATHODE FROM THE ENTRANCE END OF THE TANK TO THE EXIT END THEREOF, MEANS FOR IMPRESSING A DIFFERENCE OF POTENTIAL ACROSS THE ARTICLE AND THE CATHODE SO THAT CURRENT FLOWS FROM THE ARTICLE TO THE CATHODE, A NONCONDUCTIVE MASK INTERPOSED BETWEEN THE CATHODE AND THE ARTICLE, SAID MASK BEING SO PERFORATED THAT A PROGRESSIVELY INCREASING AREA OF THE CATHODE IS EXPOSED THEREBY TO THE ARTICLE AS THE ARTICLE IS ADVANCED FROM THE ENTRANCE END TO THE EXIT END OF THE TANK.
Claim 2
Independent Claim
119 words
AN APPARATUS FROM ELECTROPOLISHING ARTICLES, WHICH COMPRISES A TANK CONTAINING AN ELECTROLYTIC BATH, A CATHODE EXTENDING GENERALLY ACROSS THE TANK, MEANS FOR ADVANCING AN ARTICLE TO BE ELECTROPOLISHED THROUGH THE TANK ALONG A PATH SUBSTANTIALLY PARALLEL TO THE CATHODE FROM THE ENTRANCE END OF THE TANK TO THE EXIT END THEREOF, MEANS FOR IMPRESSING A DIFFERENCE OF POTENTIAL ACROSS THE ARTICLE AND THE CATHODE SO THAT CURRENT FLOWS FROM THE ARTICLE TO THE CATHODE, A NONCONDUCTIVE MASK INTERPOSED BETWEEN THE CATHODE AND THE ARTICLE, SAID MASK BEING SO PERFORATED THAT A PROGRESSIVELY INCREASING AREA OF THE CATHODE IS EXPOSED THEREBY TO THE ARTICLE AS THE ARTICLE IS ADVANCED FROM THE ENTRANCE END TO THE EXIT END OF THE TANK.
References Cited (Backward Citations)
US44876A
Cited
US655479A
Cited
US759141A
Cited
US1166712A
Cited
GB156321A
Cited
US1561744A
Cited
GB255736A
Cited
US1787274A
Cited
DE587445C
Cited
US2023998A
Cited
FR758796A
Cited
US2115005A
Cited
US2303491A
Cited
US2324652A
Cited
US2335295A
Cited
US2378002A
Cited
US2392687A
Cited
GB578354A
Cited
GB599030A
Cited
US2479302A
Cited
US2533936A
Cited
US2672987A
Cited
US2674574A
Cited
US2725356A
Cited
FR86453E
Cited
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 |