Patent US3650935A successfully refreshed from Google Patents.
US3650935A
Expired / Lapsed
US
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Apparatus for electrolytic surface treatment
Assignee: CJ WENNBERG AB
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Filing: 1969-05-05
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Granted: 1972-03-21
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Expires: 1989-05-05
Abstract
Abstract A METHOD AND AN APPARTUS FOR CARRING OUT THE METHOD OF ELECTROCHEMICAL SURFACE TREATEMENT OF METALLIC OBJECTS, THE METHOD BEING WITH BIPOLAR CURRENT CONDUCTION IN SEPARATE ELECTROYSIS CELLS COMBINED WITH THE METHOD EMPLOYING AN ELECTRODE GAP DEREASING IN THE DIRECTION OF MOVEMENT OF THE OBJECT FOR THE PURPOSE OF ACHIEVEING MAXIMUM ELECTROCHEMICAL EFFICIENCY, MAXIMUM ECONOMY, AND OPERATION RELIABILITY.
Inventors
- 👤 Bengt Ivar Andersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:20
CPC Classifications
C; C25; C25D; C25D7/00; C25D7/06; C25D7/0614
Claims Analysis
Total Claims: 0
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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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |