Patent US3002899A successfully refreshed from Google Patents.
US3002899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesion of nickel to chromium
Assignee: Individual
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Filing: 1959-07-31
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Granted: 1961-10-03
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Expires: 1979-07-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter E Reid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:43
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/38; C25D5/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR PREPARING A CHROMIUM SURFACE TO YIELD IMPROVED ADHESION AT ELEVATED TEMPERATURES WITH A NICKEL COATING TO BE DISPOSITED THEREON WHICH COMRPISES THE STEPS OF ANODICALLY ETCHING THE CHROMIUM SURFACE AT A CURRENT DENSITY OF ABOUT 3 TO ABOUT 7 AMP./DM.2 IN AN ELECTROLYTE SOLUTION COMPOSED OF GLACIAL ACETIC ACID CONTAINING ABOUT 10 TO ABOUT 15 PERCENT BY VOLUME OF CONCENTRATED SULFURIC ACID UNTIL SAID SURFACE BECOMES COATED WITH A DARK BROWN FILM, RISING SAID SURFACE WITH WATER AND GIVING SAID SURFACE A NICKEL STRIKE IN A WOOD''S NICKEL STRIKE BATH.
Claim 2
Dependent Claim
93 words
A PROCESS FOR PREPARING A CHROMIUM SURFACE TO YIELD IMPROVED ADHESION AT ELEVATED TEMPERATURES WITH A NICKEL COATING TO BE DISPOSITED THEREON WHICH COMRPISES THE STEPS OF ANODICALLY ETCHING THE CHROMIUM SURFACE AT A CURRENT DENSITY OF ABOUT 3 TO ABOUT 7 AMP./DM.2 IN AN ELECTROLYTE SOLUTION COMPOSED OF GLACIAL ACETIC ACID CONTAINING ABOUT 10 TO ABOUT 15 PERCENT BY VOLUME OF CONCENTRATED SULFURIC ACID UNTIL SAID SURFACE BECOMES COATED WITH A DARK BROWN FILM, RISING SAID SURFACE WITH WATER AND GIVING SAID SURFACE A NICKEL STRIKE IN A WOOD''S NICKEL STRIKE 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) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |