Method for controlled deposition of elements on structures of complex shapes
Abstract
Abstract THIS INVENTION IS DIRECTED TO A METHOD OF DEPOSITING METALLIC ELEMENTS ONTO PHYSICAL STRUCTURES OF COMPLEX SHAPES UNDER CAREFULLY CONTROLLED CONDITIONS. A RADIO FREQUENCY PROBE IS INSERTED INTO THE STRUCTURE TO BE COATED AND THE STRUCTURE IS EVACUATED. A RADIO FREQUENCY IS APPLIED TO THE INNER CAVITY OF THE STRUCTURE FOR INDUCTION HEATING THEREOF, THEN A GASEOUS METALLIC COMPOUND SUCH AS LEAD TETRAMETHYL IS ADMITTED INTO THE CAVITY AND CARRIED THROUGH THE CAVITY BY A CARRIER GAS SUCH AS HYDROGEN. THE RADIO FREQUENCY HEATS THE STRUCTURE AND THE GASEOUS METALLIC COMPOUND DIRECTED INTO THE CAVITY DECOMPOSES WITH THE RESULT THAT THE LEAD IONS DEPOSIT ONTO THE SURFACE OF THE CAVITY. THE METHOD IS CARRID OUT SUFFICIENTLY TO DEPOSIT A COATING OF A DESIRED THICKNESS. THE PROBE MAY BE MOVED AXIALLY THROUGH THE CAVITY AND THE RADIO FREQUENCY DECREASED WHICH WILL REVERSE THE CHEMICAL REACTION TO SMOOTH OUT THE DEPOSITED COATING.
Inventors
- 👤 Doran W Padgett
- 👤 Arnold A Shostak
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |