Patent US2970091A successfully refreshed from Google Patents.
US2970091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of alloying aluminum and copper
Assignee: Motors Liquidation Co
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Filing: 1957-09-10
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Granted: 1961-01-31
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Expires: 1977-09-10
Abstract
No abstract record available.
Inventors
- 👤 Dean K Hanink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:29
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF FORMING A COPPER-ALUMINUM ALLOY COATING ON THE SURFACE OF A METAL ARTICLE WHICH COMPRISES THE STEPS OF APPLYING A COPPER COATING HAVING A THICKNESS OF ANOUT 0.0005 INCH TO 0.003 INCH TO A SURFACE OF A METAL ARTICLE, APPLYING TO SAID COPPER COATING A FUSED SALT BATH COMPRISISING, BY WEIGHT, APPROXIMATELY 0.5% TO 12% ALUMINUM FLOURIDE, 8% TO 20% CRYOLITE, 25% TO 45% POTASSIUM CHLORIDE AND 37% TO 57% SODIUM CHLORIDE, SAID FUSED SALT BATH BEING AT A TEMPERATURE OF APPXOMATELY 1250*F. TO 1600*F., INDUCING A NEGATIVE POTENTIAL ON SAID ARTICLE WHILE IT IS IN CONTACT WITH SAID BATH SO AS TO ELECTRODEPOSIT ALUMINUM ONTO SAID COPPER COATING, THE AMOUNT OF ALUMINUM SO DEPOSITED NOT EXCEEDING THAT WHICH WILL ALLOY COMPLETELY WITH THE COPPER, DIFFUSING SAID ALUMINUM INTO SAID COPPER TO COMPLETELY ALLOY IT THEREWITH, COOLING SAID ARTICLE AND REMOVING ANY RESIDUAL SALTS FROM THE SURFACE THEREOF.
Claim 2
Independent Claim
150 words
THE METHOD OF FORMING A COPPER-ALUMINUM ALLOY COATING ON THE SURFACE OF A METAL ARTICLE WHICH COMPRISES THE STEPS OF APPLYING A COPPER COATING HAVING A THICKNESS OF ANOUT 0.0005 INCH TO 0.003 INCH TO A SURFACE OF A METAL ARTICLE, APPLYING TO SAID COPPER COATING A FUSED SALT BATH COMPRISISING, BY WEIGHT, APPROXIMATELY 0.5% TO 12% ALUMINUM FLOURIDE, 8% TO 20% CRYOLITE, 25% TO 45% POTASSIUM CHLORIDE AND 37% TO 57% SODIUM CHLORIDE, SAID FUSED SALT BATH BEING AT A TEMPERATURE OF APPXOMATELY 1250*F. TO 1600*F., INDUCING A NEGATIVE POTENTIAL ON SAID ARTICLE WHILE IT IS IN CONTACT WITH SAID BATH SO AS TO ELECTRODEPOSIT ALUMINUM ONTO SAID COPPER COATING, THE AMOUNT OF ALUMINUM SO DEPOSITED NOT EXCEEDING THAT WHICH WILL ALLOY COMPLETELY WITH THE COPPER, DIFFUSING SAID ALUMINUM INTO SAID COPPER TO COMPLETELY ALLOY IT THEREWITH, COOLING SAID ARTICLE AND REMOVING ANY RESIDUAL SALTS FROM THE SURFACE THEREOF.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |