Electroplating large cylindrical tanks
Abstract
Abstract THIS SPECIFICATION DISCLOSES A METHOD AND APPARATUS FOR ELECTROPLATING THE INTERIOR SURFACE OF A LARGE VESSEL SUCH AS THE TANK OF A RAILROAD TANK CAR. A LARGE HOLE IS CUT INTO THE END WALL OF THE VESSEL AND A PREASSEMBLED ANODE IS BROUGHT INTO THE VESSEL THROUGH THIS HOLE. THE VESSEL IS MOUNTED ON ROLLERS FOR ROTATION ABOUT THE ANODE. THE HOLE IN THE END WALL IS CLOSED WITH A CIRCULAR PLATE DESIGNED FOR THIS PURPOSE. THE INTERIOR SURFACE OF THE VESSEL IS FIRST ACTIVATED BY TREATING IT WITH ACID AND REVERSE CURRENT WHILE THE VESSEL IS ROTATED ABOUT THE ANODE AND PURGED BY MEANS FOR AN INERT GAS. THE VESSEL IS THEN PARTIALLY FILLED WITH ELECTROPLATING SOLUTION AND IS ROTATED ABOUT THE ANODE WHILE THE ELECTROPLATING OF THE INTERIOR SURFACE OF TH VESSEL IS CARRIED OUT. THE ANODE IS THEN REMOVED AND THE PORTION OF THE END WALL WHICH IS CUT AWAY IS WELDED BACK IN PLACE, THE PORTION HAVING BEEN PREVIOUSLY ELECTROPLATED IN A CONVENTIONAL MANNER.
Inventors
- 👤 Siegfried G Bart
Bibliographic Details
Claims Analysis
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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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |