US3829367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic polishing of metals
Assignee: Individual
•
Filing: 1972-07-14
•
Granted: 1974-08-13
•
Expires: 1992-07-14
Abstract
Abstract ELECTRLYTIC POLISHING OF A METAL BODY. IN A FIRST STAGE INTERGRANULAR CORROSION OF THE BODY IS INDUCED BY ELECTROLYTIC CATHODIC TREATMENT IN AN ACIDIC ELECTROLYTE CONTAINING A COPPER SALT. IN A SECOND STAGE THE POLARITY IS REVERSED AND THE BODY IS SUBJECTED TO ELECTRLYTIC ANODIC TREATMENT. THE ELECTRLYTE IN THE SECOND STAGE MAY BE THE SAME AS IN THE FIRST STAGE OR DIFFERENT.
Inventors
- 👤 S Raviv
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:05
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24; C25F3/18; C25F3/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |