US3068158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anodic brightening and polishing of metal
Assignee: Siemens Schuckertwerke AG
•
Filing: 1959-01-20
•
Granted: 1962-12-11
•
Expires: 1979-01-20
Abstract
No abstract record available.
Inventors
- 👤 Gruss Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:12
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16; C25F3/22; C25F3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A METHOD OF BRIGHTENING STELL AND IRON METAL, COMPRISING SUBJECTING THE METAL TO ANODIC ETCHING IN A WATERFREE ELECTROLYTE CONSISTING OF A WATER-FREE SATURATED SOLUTION OF BARIUM BOROFLUORIDE IN WATER-FREE PHOSPHORIC ACID.
Claim 2
Independent Claim
32 words
A METHOD OF BRIGHTENING STELL AND IRON METAL, COMPRISING SUBJECTING THE METAL TO ANODIC ETCHING IN A WATERFREE ELECTROLYTE CONSISTING OF A WATER-FREE SATURATED SOLUTION OF BARIUM BOROFLUORIDE IN WATER-FREE PHOSPHORIC ACID.
References Cited (Backward Citations)
US2108603A
Cited
GB550175A
Cited
GB630854A
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US2521106A
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GB618120A
Cited
US2928777A
Cited
US2920023A
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US2986499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |