US3340073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of chemical plating baths
Assignee: Bayer AG
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Filing: 1966-12-02
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Granted: 1967-09-05
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Expires: 1986-12-02
Abstract
No abstract record available.
Inventors
- 👤 Zirngiebl Eberhard
- 👤 Klein Heinz-Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:08
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/1601; C23C18/1617
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
127 words
IN A PROCESS FOR THE REGENERATION OF A CHEMICAL PLATING BATH CONTAINING AS REDUCING AGENT A BORON HYDROGEN COMPOUND HAVING 1 TO 4 HYDROGEN ATOMS LINKED DIRECTLY TO THE BORON ATOM, ALAKI METAL HYDROXIDE OR AMMONIA, NICKEL AND/OR COBALT METAL SALT AND A COMPLEX FORMER SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND ORGANIC COMPLEX FORMING AGENTS, THE STEPS WHICH COMPRISE ADDING TO THE EXHAUSTED PLATING BATH AT LEAST ONE WATER SOLUBLE ALKALINE EARTH METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF MAGNESIUM CHLORIDE, MAGNESIUM SULFATE, MAGNESIUM ACETATE CALCIUM CHLORIDE, STRONTIUM CHLORIDE AND BARIUM CHLORIDE, REMOVING THE PRECIPITATED BORATES AND HYDROXIDES THEREBY FORMED AND ADDING TO THE BATH LIQUID AT LEAST THAT AMOUNT OF THE BATH COMPONENTS REQUIRED TO RE-ESTABLISH THE INITIAL CONTENT THEREOF IN SAID BATH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |