US3915716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical nickel plating bath
Assignee: Bayer Pharma AG
•
Filing: 1970-03-18
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Granted: 1975-10-28
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Expires: 1990-03-18
Abstract
Abstract A chemical nickel plating bath containing hydrazine or its salts for precipitating nickel coatings in a substrate and having catalytic or corrosion inhibiting properties.
Inventors
- 👤 Wolf-Dieter Haack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN AN ALKALINE CHEMICAL NICKEL PALATING BATH HAVING A SURFACE LAYER OF DI-N-BUTYL ETHER AND A PH ABOVE 11 COMPRISING AN AQUEOUS SOLUTION OF A NICKLE SALT, A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDRAZINE AND HYDRAZINE SALTS, A COMPLEXING AGENT AND A BUFFERING AGENT, THE IMPROVEMEMT OF WHICH COMPRISING FROM 0.05 TO 1 MOLE PER LITER OF AT LEAST ONE WATER SOLUBLFE SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF AMONIUM, SODIUM, POTASSIUM AND HYDRAZONIUM SALTS OF CARBONIC ACID AND PHOSPHORIC ACID, SAID BATH COMPRISING ABOUT 10**-4 TO 10**-2 MOLES PER LITER OF AT LEAST ONE WATER SOLU SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, GERMANIUM, TIN AND THALLIUM.
Claim 2
Dependent Claim
118 words
IN AN ALKALINE CHEMICAL NICKEL PALATING BATH HAVING A SURFACE LAYER OF DI-N-BUTYL ETHER AND A PH ABOVE 11 COMPRISING AN AQUEOUS SOLUTION OF A NICKLE SALT, A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDRAZINE AND HYDRAZINE SALTS, A COMPLEXING AGENT AND A BUFFERING AGENT, THE IMPROVEMEMT OF WHICH COMPRISING FROM 0.05 TO 1 MOLE PER LITER OF AT LEAST ONE WATER SOLUBLFE SALT OF AN ACID SELECTED FROM THE GROUP CONSISTING OF AMONIUM, SODIUM, POTASSIUM AND HYDRAZONIUM SALTS OF CARBONIC ACID AND PHOSPHORIC ACID, SAID BATH COMPRISING ABOUT 10**-4 TO 10**-2 MOLES PER LITER OF AT LEAST ONE WATER SOLU SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, GERMANIUM, TIN AND THALLIUM.
References Cited (Backward Citations)
US2430581A
Cited
US3024134A
Cited
US2822294A
Cited
US2916401A
Cited
US3198659A
Cited
US3403035A
Cited
US3438798A
Cited
US3370974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |