Patent US4640869A successfully refreshed from Google Patents.
US4640869A
Expired / Lapsed
US
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Hard metal watch case with a resistant coating
Assignee: Rado Uhren AG
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Filing: 1985-05-07
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Granted: 1987-02-03
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Expires: 2005-05-07
Abstract
Abstract The watch case has its body fashioned of hard metal of hardness preferably greater than 1400 Vickers. The body is overlaid by a two layer coating. The chemical composition of the two layers is identical and comprises the combination of a metal and an element whose atomic number is less than 9. The first layer is deposited by CVD and the second by PVD. If the metal is titanium and the element nitrogen there is obtained on the body of the scratch proof case a perfectly adhering hard coating of gold color.
Inventors
- 👤 Eric Loth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:32
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/006; C23C14/00; C23C14/0015; C23C14/06; C23C14/0635; C23C14/0641; C23C14/08; C23C16/22; C23C16/30; C23C16/32; C23C16/34; C23C16/40; G; G04; G04B; G04B37/00; G04B37/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12785
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A watch case comprising a case body overlaid by a coating, the hardness of the body being greater than 600 HV 1 , the coating comprising a first layer obtained by the combination of a metal and an element whose atomic number is less than 9 applied to said body by chemical vapour deposition (CVD) and a second layer having the same composition as the first layer applied onto said first layer by physical vapour deposition (PVD).
Claim 2
Dependent Claim
77 words
A watch case comprising a case body overlaid by a coating, the hardness of the body being greater than 600 HV 1 , the coating comprising a first layer obtained by the combination of a metal and an element whose atomic number is less than 9 applied to said body by chemical vapour deposition (CVD) and a second layer having the same composition as the first layer applied onto said first layer by physical vapour deposition (PVD).
Claim 3
Dependent Claim
29 words
A watch case as set forth in claim 1 wherein the case body is formed of a scratch proof material exhibiting a hardness greater than 1400 HV 5 .
Claim 4
Dependent Claim
20 words
A watch case as set forth in claim 2 wherein the first and second coating layers comprise titanium nitride (TiN).
Claim 5
Dependent Claim
20 words
A watch case as set forth in claim 2 wherein the first and second coating layers comprise titanium carbide (TiC).
Claim 6
Dependent Claim
20 words
A watch case as set forth in claim 2 wherein the first and second coating layers comprise a metallic oxide.
References Cited (Backward Citations)
US3242664A
Cited
US4101703A
Cited
US4101703B1
Cited
DE2528255A1
Cited
FR2302350A1
Cited
US4252862A
Cited
DD148349A1
Cited
JPS5939785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |