US3203884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bath and method for anodic brightening of metals
Assignee: Siemens Schuckertwerke AG
•
Filing: 1960-11-18
•
Granted: 1965-08-31
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Expires: 1980-11-18
Abstract
No abstract record available.
Inventors
- 👤 Gruss Heinz
- 👤 Gillwald Willi
- 👤 Kutzelnigg Artur
- 👤 Laub Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:49
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
BATH FOR ANOIDIC BRIGHTENING OF METALS AND ALLOYS, PARTICULARLY CARBON STEEL, CONSISTING OF WATER-CONTAINING PHOSPHORIC ACID AND AN ADDITION OF FLUOBORIC ACID IN AN AMOUNT OF 1 TO 200 GRAMS PER LITER, THE WATER CONTENT OF THE BATH BEING 50 TO 250 GRAMS PER LITER.
Claim 2
Dependent Claim
45 words
BATH FOR ANOIDIC BRIGHTENING OF METALS AND ALLOYS, PARTICULARLY CARBON STEEL, CONSISTING OF WATER-CONTAINING PHOSPHORIC ACID AND AN ADDITION OF FLUOBORIC ACID IN AN AMOUNT OF 1 TO 200 GRAMS PER LITER, THE WATER CONTENT OF THE BATH BEING 50 TO 250 GRAMS PER LITER.
References Cited (Backward Citations)
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US2521106A
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US2542779A
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US2662814A
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US3010854A
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Cited
US2935455A
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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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |