US3349014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for the treatment of an aluminum surface
Assignee: McDonnell Douglas Corp
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Filing: 1964-08-28
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Granted: 1967-10-24
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Expires: 1984-08-28
Abstract
No abstract record available.
Inventors
- 👤 William H Hyter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:07
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/10; C25D17/14; C25D11/00; C25D11/02; C25D11/04; C25D11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
THE METHOD OF ANODIZING A JPREDETERMINDED SURFACE AREA OF AN ALUMINUM PART, WHICH COMPRISES APPLYING A LIQUID ELECTROLYTE TO A POROUS JPAD, SAID JPOROUS PAD BEING POSITIONED ON A METAL ELECTRODE, SAID ELECTROLYTE COMPRISING ABOUT 2 ABOUT 12% BY WEIGHT OF PHOSPHORIC ACID, ABOUT 9 TO ABOUT 30% BY WEIGHT OF ACETIC ACID, AND ABOUT 7% TO ABOUT 60% BY WEIGHT OF SULFURIC ACID, CONNECTING SAID ELECTRODE, SAID PAD AND SAID JPART IN AN ELECTRIC CIRCUIT WITH SAID PART FORMING THE ANODE, CONTACTING SAID PAD WITH SAID SURFACE AREA OF SAID PART, MOVING SAID PAD OVER SAID PREDETERMINED SURFACE AREA OF SAID PAT AND MAINTAINING CONTINUOUS CONTACT BETWEEN SAID KPAD AND SAID SURFACE AREA WHILE PASSING DIRECT CURRENT THROUGH SAID CIRCUIT, AND CONTINUING SAID MOVEMENT OF SAID PAD AND SAID PASSAGE OF CURRENT FOR A PERIOD SUFFICIENT TO FORM AN ANODIC COATING ON SAID PREDETERMINED SURFACE AREA OF SAID PART.
Claim 2
Independent Claim
150 words
THE METHOD OF ANODIZING A JPREDETERMINDED SURFACE AREA OF AN ALUMINUM PART, WHICH COMPRISES APPLYING A LIQUID ELECTROLYTE TO A POROUS JPAD, SAID JPOROUS PAD BEING POSITIONED ON A METAL ELECTRODE, SAID ELECTROLYTE COMPRISING ABOUT 2 ABOUT 12% BY WEIGHT OF PHOSPHORIC ACID, ABOUT 9 TO ABOUT 30% BY WEIGHT OF ACETIC ACID, AND ABOUT 7% TO ABOUT 60% BY WEIGHT OF SULFURIC ACID, CONNECTING SAID ELECTRODE, SAID PAD AND SAID JPART IN AN ELECTRIC CIRCUIT WITH SAID PART FORMING THE ANODE, CONTACTING SAID PAD WITH SAID SURFACE AREA OF SAID PART, MOVING SAID PAD OVER SAID PREDETERMINED SURFACE AREA OF SAID PAT AND MAINTAINING CONTINUOUS CONTACT BETWEEN SAID KPAD AND SAID SURFACE AREA WHILE PASSING DIRECT CURRENT THROUGH SAID CIRCUIT, AND CONTINUING SAID MOVEMENT OF SAID PAD AND SAID PASSAGE OF CURRENT FOR A PERIOD SUFFICIENT TO FORM AN ANODIC COATING ON SAID PREDETERMINED SURFACE AREA OF SAID PART.
References Cited (Backward Citations)
US2989447A
Cited
US2540602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |