US3901994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized video disc having a dielectric coating thereon
Assignee: RCA Corp
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Filing: 1974-02-04
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Granted: 1975-08-26
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Expires: 1994-02-04
Abstract
Abstract Poly-p-xylylene is utilized for a thin conformal dielectric coating on metallized discs. The poly-p-xylylene coating is deposited by vapor deposition and then hardened by exposure to a glow discharge. A method of hardening a polymeric dielectric coating by exposure to a glow discharge after the coating has been deposited on the disc.
Inventors
- 👤 Robert Michael Mehalso
- 👤 Grzegorz Kaganowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; G; G11; G11B; G11B9/00; G11B9/06; G11B9/061; G11B9/063; G11B9/067; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24521; Y10T428/24537; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
AN INFORMATION STORAGE MEANS OF THE TYPE WHEREIN CAPACITANCE VARIATIONS ARE PROVIDED TO A PLAYBACK SYSTEM AND SAID STORAGE MEANS INCLUDES A CONDUCTIVE DISC HAVING INFORMTION RECORDED IN THE FORM OF GEOMERTIC VARIATIONS IN THE SURFACE THEREOF, WHEREIN THE IMPROVEMENT COMPRISES: A DIELECTRIC COATING OF HARDENED POLY-P-XYLENE ON SAID CONDUCTIVE DISC, SAID COATING HARDENED BY EXPOSURE TO A GLOW DISCHARGE TO CROSSLINK SAID POLY-P-XLYLENE AFTER SAID COATING HAS BEEN COMPLETELY DEPOSITED ON SAID CONDUCTIVE DISC, SAID COATING BEING CONFORMAL WITH SAID GEOMETRIC VARIATIONS.
Claim 2
Dependent Claim
83 words
AN INFORMATION STORAGE MEANS OF THE TYPE WHEREIN CAPACITANCE VARIATIONS ARE PROVIDED TO A PLAYBACK SYSTEM AND SAID STORAGE MEANS INCLUDES A CONDUCTIVE DISC HAVING INFORMTION RECORDED IN THE FORM OF GEOMERTIC VARIATIONS IN THE SURFACE THEREOF, WHEREIN THE IMPROVEMENT COMPRISES: A DIELECTRIC COATING OF HARDENED POLY-P-XYLENE ON SAID CONDUCTIVE DISC, SAID COATING HARDENED BY EXPOSURE TO A GLOW DISCHARGE TO CROSSLINK SAID POLY-P-XLYLENE AFTER SAID COATING HAS BEEN COMPLETELY DEPOSITED ON SAID CONDUCTIVE DISC, SAID COATING BEING CONFORMAL WITH SAID GEOMETRIC VARIATIONS.
Claim 3
Dependent Claim
15 words
An information storage means in accordance with claim 1 wherein said dielectric coating is poly-p-chloro-xylylene.
Claim 4
Dependent Claim
36 words
An information storage means in accordance with claim 1 wherein said coating has been hardened by exposure to said glow discharge for at least 30 seconds after said coating has been deposited on said conductive disc.
Claim 5
Dependent Claim
17 words
An information storage means in accordance with claim 3 wherein said coating is approximately 500A in thickness.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |