US2540602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the surface treatment of metals
Assignee: Lockheed Martin Corp
•
Filing: 1946-07-03
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Granted: 1951-02-06
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Expires: 1966-07-03
Abstract
No abstract record available.
Inventors
- 👤 Frank W Thomas
- 👤 Simon Eli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
C; C25; C25D; C25D17/00; C25D17/10; C25D17/14; C25D11/00; C25D11/005; C25D11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE METHOD OF FORMING A CORROSION RESISTANT ANODIC COATING ON THE SURFACE OF A METAL PART WHICH COMPRISES SUPPLYING A LIQUID ELECTROLYTE TO A POROUS PAD, CONNECTING SAID PART AND PAD WITH THE OPPOSITE SIDES OF AN ELECTRIC ENERGY SOURCE WHICH SUPPLIES A VOLTAGE OF FROM 20 TO 200 VOLTS AND CURRENT DENSITY OF FROM APPROXIMATELY 180 TO APPROXIMATELY 2750 AMPERES PER SQUARE FOOT, BRINGING THE SURFACE OF SAID PART AND THE PAD INTO ENGAGEMENT, AND MOVING THE PAD AND PART RELATIVE TO ONE ANOTHER WHILE SAID ENGAGEMENT IS MAINTAINED AND WHILE THE PART AND PAD ARE CONNECTED WITH SAID ENERGY SOURCE TO PROGRESSIVELY FORM A CORROSION RESISTANT ANODIC FILM ON SAID SURFACE.
Claim 2
Independent Claim
113 words
THE METHOD OF FORMING A CORROSION RESISTANT ANODIC COATING ON THE SURFACE OF A METAL PART WHICH COMPRISES SUPPLYING A LIQUID ELECTROLYTE TO A POROUS PAD, CONNECTING SAID PART AND PAD WITH THE OPPOSITE SIDES OF AN ELECTRIC ENERGY SOURCE WHICH SUPPLIES A VOLTAGE OF FROM 20 TO 200 VOLTS AND CURRENT DENSITY OF FROM APPROXIMATELY 180 TO APPROXIMATELY 2750 AMPERES PER SQUARE FOOT, BRINGING THE SURFACE OF SAID PART AND THE PAD INTO ENGAGEMENT, AND MOVING THE PAD AND PART RELATIVE TO ONE ANOTHER WHILE SAID ENGAGEMENT IS MAINTAINED AND WHILE THE PART AND PAD ARE CONNECTED WITH SAID ENERGY SOURCE TO PROGRESSIVELY FORM A CORROSION RESISTANT ANODIC FILM ON SAID SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |