Patent US4444849A successfully refreshed from Google Patents.
US4444849A
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Scratch resistant antistatic sound and picture carrier and process for its production
Assignee: GFO GESELLSCHAFT fur OBERFLACHENTECHNIK MBH A GERMAN CORP
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Filing: 1982-02-18
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Granted: 1984-04-24
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Expires: 2002-02-18
Abstract
Abstract Scratch resistant and antistatic sound and picture carriers made of synthetic resins are obtained by providing their surfaces with a thin metal layer. The previously known gold layers applied electrolytically or in high vacuum have the disadvantage that they either were not sufficiently resistant to abrasion or the quality of reproduction was greatly impaired. Better results are obtained by providing the surfaces of the sound or picture carrier (1) with a thin coating (2), made of an iron-chromium-nickel alloy applied in a high vacuum and in a given case coating this layer with a noble metal coating (3), especially a gold coating, likewise applied in a high vacuum.
Inventors
- 👤 Axel Breuninger
- 👤 Richard Pollmann
- 👤 Peter Scheyrer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/68; G11B3/70; G11B3/705; G11B3/707; G11B3/682; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/26; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
116 words
A scratch resistant, antistatic sound or picture carrier made of an inner synthetic resin layer and having applied to the surfaces thereof either (1) outer layers consisting of an iron-chromium-nickel alloy, containing 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron or (2) having applied thereto intermediate layers consisting essentially of either (1) an iron-chromium-nickel alloy consisting of 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron or (b) an iron-chromium alloy and outer layers consisting essentially of a noble metal or a noble metal alloy coating said intermediate layers, the outer layer in each of (1) or (2) having a thickness of 0.2 to 0.6μ.
Claim 2
Dependent Claim
116 words
A scratch resistant, antistatic sound or picture carrier made of an inner synthetic resin layer and having applied to the surfaces thereof either (1) outer layers consisting of an iron-chromium-nickel alloy, containing 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron or (2) having applied thereto intermediate layers consisting essentially of either (1) an iron-chromium-nickel alloy consisting of 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron or (b) an iron-chromium alloy and outer layers consisting essentially of a noble metal or a noble metal alloy coating said intermediate layers, the outer layer in each of (1) or (2) having a thickness of 0.2 to 0.6μ.
Claim 3
Dependent Claim
11 words
A carrier according to claim 1 which is a sound disc.
Claim 4
Dependent Claim
15 words
A carrier according to claim 2 wherein the synthetic resin is a vinyl chloride resin.
Claim 5
Dependent Claim
38 words
A carrier according to claim 1 which contains as the outer layers or the intermediate layers an alloy consisting of an iron-chromium-nickel alloy containing 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron.
Claim 6
Dependent Claim
34 words
A carrier according to claim 1 which contains as the outer layers an alloy consisting of an iron-chromium-nickel alloy containing 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron.
Claim 7
Dependent Claim
18 words
A carrier according to claim 5 wherein the iron-chromium-nickel alloy layers have been applied in a high vacuum.
Claim 8
Dependent Claim
51 words
A carrier according to claim 1 wherein the iron-chromium-nickel alloy is applied as intermediate layers, the alloy consisting of 10 to 25 weight % chromium, 5 to 20 weight % nickel, balance iron, and there are present as a coating thereon the outer layers of noble metal or noble metal alloy.
Claim 9
Dependent Claim
14 words
A carrier according to claim 7 wherein the outer layers are made of gold.
Claim 10
Dependent Claim
26 words
A carrier according to claim 1 containing as the outer layers a noble metal or noble metal alloy and containing as intermediate layers an iron-chromium alloy.
Claim 11
Dependent Claim
19 words
A carrier according to claim 9 wherein the iron-chromium alloy contains 10 to 22 weight % chromium, balance iron.
Claim 12
Dependent Claim
17 words
A carrier according to claim 10 wherein the iron-chromium alloy contains 12 to 18 weight % chromium.
Claim 13
Dependent Claim
14 words
A carrier according to claim 10 wherein the outer layers are made of gold.
Claim 14
Dependent Claim
31 words
A carrier according to claim 1 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers are present and have a thickness of 0.02 to 0.3μ.
Claim 15
Dependent Claim
31 words
A carrier according to claim 4 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers are present and have a thickness of 0.02 to 0.3μ.
Claim 16
Dependent Claim
28 words
A carrier according to claim 7 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers have a thickness of 0.02 to 0.3μ.
Claim 17
Dependent Claim
28 words
A carrier according to claim 8 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers have a thickness of 0.02 to 0.3μ.
Claim 18
Dependent Claim
28 words
A carrier according to claim 10 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers have a thickness of 0.02 to 0.3μ.
Claim 19
Dependent Claim
28 words
A carrier according to claim 12 wherein the outer layers have a thickness of 0.2 to 0.6μ and the intermediate layers have a thickness of 0.02 to 0.3μ.
Claim 20
Dependent Claim
11 words
A carrier according to claim 1 which is a video disc.
Claim 21
Dependent Claim
15 words
A carrier according to claim 19 wherein the synthetic resin is a vinyl chloride resin.
Claim 22
Dependent Claim
16 words
A carrier according to claim 6 wherein the vacuum is of a pressure <8×10 -4 mbar.
References Cited (Backward Citations)
GB1474842A
Cited
US4077051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |