US3687722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating selective areas of the surface of a body
Assignee: RCA Corp
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Filing: 1971-03-10
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Granted: 1972-08-29
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Expires: 1991-03-10
Abstract
Abstract A PRE-SELECTED AREA OF THE SURFACE OF A BODY OF AN ELECTRICAL INSULATING OR SEMICONDUCTING MATERIAL IS COATED WITH A FILM OF A MATERIAL WHICH NORMALLY ADHERES WELL TO THE BODY MATERIAL. THIS IS ACHIEVED BY FIRST IMPLANTING INTO THE UNSELECTED AREA OF THE SURFACE OF THE BODY IONS OF A MATERIAL WHICH PREVENTS GOOD ADHERENCE OF THE MATERIAL OF THE FILM TO THE BODY. THE FILM IS THEN COATED OVER THE ENTIRE AREA OF THE SURFACE OF THE BODY SO THAT THE FILM HAS GOOD ADHERENCE TO THE BODY OVER THE PRE-SELECTED AREA BUT POOR ADHERENCE OVER THE ION IMPLANTED AREA. THE POORLY ADHERED PORTION ON THE FILM IS THEN REMOVED, SUCH AS BY ULTRASONIC AGITATION.
Inventors
- 👤 Arjun Nath Saxena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/32; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/02; Y10S148/106; Y10S148/139; Y10S438/00; Y10S438/942; Y10S438/948; Y10S438/951
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |