US2692850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum electroforming
Assignee: Battelle Development Corp
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Filing: 1951-11-02
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Granted: 1954-10-26
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Expires: 1971-11-02
Abstract
No abstract record available.
Inventors
- 👤 William H Safranek
- 👤 William C Schickner
- 👤 Charles L Faust
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:46
CPC Classifications
C; C25; C25D; C25D1/00; C25D3/00; C25D3/02; C25D3/42; C25D3/44
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
THE METHOD OF ELECTROFORMING A THICK, DENSE ALUMINUM ARTICLE WHICH COMPRISES THE STEPS OF FORMING AN ELECTRICALLY CONDUCTIVE BASE IN A DESIRED CONFIGURATION, IMMERSING SAID ARTICLE IN A BATH, SAID BATH COMPRISING A SOLUTION OF A LIQUID AROMATIC HYDROCARBON SOLVENT IN WHICH IS DISSOLVED AN ORGANIC ADDITIVE SELECTED FROM THE GROUP CONSISTING OF METHYL TERT-BUTYL ETHER, ETHYL ETHER, AND DIPHENYL OXIDE, IN AN AMOUNT SUFFICIENT TO ACHIEVE SAID THICKNESS AND DENSITY, AND A FUSION OF AN ALUMINUM HALIDE AND A QUATERNARY SALT OF NITROGEN, SAID SOLVENT BEING PRESENT IN SUFFICIENT QUANTITY TO FORM A LAYER OF EXCESS SOLVENT, CONTINUOUSLY DISPERSING SAID EXCESS SOLVENT THROUGHOUT THE BATH, PASSING AN ELECTRIC CURRENT BETWEEN AN ALUMINUM ANODE AND SAID CONDUCTIVE BASE AS A CATHODE UNTIL AN ALUMINUM COATING IS DEPOSITED THEREON, REMOVING SAID COATED BASE FROM THE BATH, AND SEPARATING SAID CONDUCTIVE BASE FROM SAID ALUMINUM COATING.
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) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |