US3098804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal treatment
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1960-03-28
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Granted: 1963-07-23
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Expires: 1980-03-28
Abstract
No abstract record available.
Inventors
- 👤 Henry J Wittrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:53
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42; C25D5/44; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12611; Y10T428/12771; Y10T428/12778; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A METHOD OF PRODUCING A FIRMLY ADHERENT COATING OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND CHROMIUM ON AN ARTICLE OF AN ALUMINUM ALLOY CONTAINING BY WEIGHT NOT MORE THAN 0.25% SILICON, NOT MORE THAN 0.25% IRON, 1.30 TO 3.70% COPPER, NOT MORE THAN 0.25% MANGANESE, 0.02 TO 1.20% MAGNESIUM, NOT MORE THAN 0.30% ZINC, A SMALL BUT EFFECTIVE AMOUNT OF TITANIUM SUFFICIENT FOR GRAIN REFINEMENT, IMPURITIES IN NORMAL AMOUNTS, BALANCE SUBSTANTIALLY ALUMINUM, SAID METHOD COMPRISING THE STEPS OF IMMERSING SAID ALUMINUM ALLOY AS AN ANODE IN AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF PHOSPHORIC ACID AND SULFURIC ACID, BALANCE WATER, PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTROLYTE FOR A TIME PERIOD OF FROM 1 TO 30 MINUTES, AT CURRENT DENSITY OF FROM 12 TO 120 AMPERES PER SQUARE FOOT AND A VOLTAGE OF LESS THAN 40 VOLTS, THEREBY PRODUCING AN OXIDE COATING ON THE SURFACE OF SAID ARTICLE THEREAFTER ELECTODEPOSITING A LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND CHROMIUM DIRECTLY ON SAID OXIDE-COATED SURFACE.
Claim 2
Independent Claim
171 words
A METHOD OF PRODUCING A FIRMLY ADHERENT COATING OF A METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND CHROMIUM ON AN ARTICLE OF AN ALUMINUM ALLOY CONTAINING BY WEIGHT NOT MORE THAN 0.25% SILICON, NOT MORE THAN 0.25% IRON, 1.30 TO 3.70% COPPER, NOT MORE THAN 0.25% MANGANESE, 0.02 TO 1.20% MAGNESIUM, NOT MORE THAN 0.30% ZINC, A SMALL BUT EFFECTIVE AMOUNT OF TITANIUM SUFFICIENT FOR GRAIN REFINEMENT, IMPURITIES IN NORMAL AMOUNTS, BALANCE SUBSTANTIALLY ALUMINUM, SAID METHOD COMPRISING THE STEPS OF IMMERSING SAID ALUMINUM ALLOY AS AN ANODE IN AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF PHOSPHORIC ACID AND SULFURIC ACID, BALANCE WATER, PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTROLYTE FOR A TIME PERIOD OF FROM 1 TO 30 MINUTES, AT CURRENT DENSITY OF FROM 12 TO 120 AMPERES PER SQUARE FOOT AND A VOLTAGE OF LESS THAN 40 VOLTS, THEREBY PRODUCING AN OXIDE COATING ON THE SURFACE OF SAID ARTICLE THEREAFTER ELECTODEPOSITING A LAYER OF METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL AND CHROMIUM DIRECTLY ON SAID OXIDE-COATED SURFACE.
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |