Fabricating and electropolishing interiors of cylindrical vessels with domed ends
Abstract
Abstract A METHOD OF FABRICATING CYLINDRICAL VESSELS HAVING DOMED OR NECKED ENDS, WITH EACH END HAVING AT LEAST A PROTRUDING CENTER ACCESS PORT OR NOZZLE, AND PROVIDING THE INTERIOR SURFACES OF THE VESSEL INCLUDING THE ACCESS PORTS OR NOZZLES WITH ELECTROPOLISHED SURFACES. THE INTERIOR SURFACES OF THE DOMED ENDS, INCLUDING THE ACCESS PORTS OR NOZZLES THEREON, ARE FIRST POLISHED AND THEN ASSEMBLED BY WELDING TO THE OPPOSITE ENDS OF THE MAIN CYLINDRICAL BODY. THE WELDS ARE USUALLY GROUND SMOOTH ON THE INTERIOR AND THEN A PENDANT CATHODE IMMERSED IN A SHALLOW BATH OF ELECTROPOLISHING SOLUTION SERVES TO POLISH THE INNER SURFACE OF THE CYLINDRICAL BODY INCLUDING THE WELD AREAS AS THE VESSEL IS SLOWLY ROTATED WHILE SUPPORTED IN A GENERALLY HORIZONTAL POSITION.
Inventors
- 👤 John F Jumer
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |