Patent US4297175A successfully refreshed from Google Patents.
US4297175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for partially electroplating flat silver
Assignee: WMF Group GmbH
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Filing: 1980-12-08
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Granted: 1981-10-27
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Expires: 2000-12-08
Abstract
Abstract A process for partially silver electroplating the metal surface of a flat silver part wherein part of the surface is covered prior to silvering with a plating-resistant dipping enamel. A separation surface is provided between the exposed surface of the part to be covered with the dipping enamel and the exposed surface of the lengthwise adjacent part to be silvered. The separation surface consists of a material which is more difficult to wet with the dipping enamel than the metal of the surface to be covered. Preferably, the separation surface is the peripheral surface of a spacer lamination composed of polytetrafluoroethylene.
Inventors
- 👤 Hans Schlegel
- 👤 Theodor Nowotny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:06
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
120 words
a process for partially silver electroplating a flat silver part, the part including two metal components to be joined lengthwise, the first component to be covered with a plating-resistant dipping enamel and the second component to be electroplated with silver, the process comprising the steps of: (a) joining lengthwise the said two metal components; (b) providing a thin separation surface between exposed surfaces of said two components, said separation surface consisting of a material which is more difficult to wet with the dipping enamel than the metal of the first component to be covered; (c) dipping said first component into said enamel until contact is achieved between said enamel and said separation surface; and (d) silver electroplating said second component.
Claim 2
Dependent Claim
120 words
a process for partially silver electroplating a flat silver part, the part including two metal components to be joined lengthwise, the first component to be covered with a plating-resistant dipping enamel and the second component to be electroplated with silver, the process comprising the steps of: (a) joining lengthwise the said two metal components; (b) providing a thin separation surface between exposed surfaces of said two components, said separation surface consisting of a material which is more difficult to wet with the dipping enamel than the metal of the first component to be covered; (c) dipping said first component into said enamel until contact is achieved between said enamel and said separation surface; and (d) silver electroplating said second component.
Claim 3
Dependent Claim
24 words
The process of claim 1, including, immediately prior to said dipping, the further step of grinding the transition site of said two joined components.
Claim 4
Dependent Claim
42 words
The process of claim 1, wherein said two components are joined lengthwise to a spacer lamination, said spacer lamination separating exposed surfaces of said first and second components and further wherein the peripheral surface of said spacer lamination provides said separation surface.
Claim 5
Dependent Claim
45 words
The process of claim 3 wherein said flat silver part is a table knife, said first metal component is a blade having a crop thereof, said second metal component is a handle and said spacer lamination separates the crop of said blade from said handle.
Claim 6
Dependent Claim
18 words
The process of claim 3, wherein said spacer lamination has a thickness of at least about 0.1 mm.
Claim 7
Dependent Claim
16 words
The process of claim 5 wherein said spacer lamination has a thickness of about 0.2 mm.
Claim 8
Dependent Claim
13 words
The process of claim 1, wherein said separation surface is made of polytetrafluoroethylene.
Claim 9
Dependent Claim
100 words
In a process for partially silver electroplating the metal surface of a flat silver part wherein, prior to silvering a lengthwise adjacent part of the surface, a part of the surface is covered with a plating-resistant dipping enamel, the improvement comprising the step of: providing a separation surface between an exposed surface of said part to be covered with the dipping enamel and an exposed surface of said lengthwise adjacent part to be silvered, said separation surface consisting of a material which is more difficult to wet with the dipping enamel than the metal of the surface to be covered.
Claim 10
Dependent Claim
100 words
In a process for partially silver electroplating the metal surface of a flat silver part wherein, prior to silvering a lengthwise adjacent part of the surface, a part of the surface is covered with a plating-resistant dipping enamel, the improvement comprising the step of: providing a separation surface between an exposed surface of said part to be covered with the dipping enamel and an exposed surface of said lengthwise adjacent part to be silvered, said separation surface consisting of a material which is more difficult to wet with the dipping enamel than the metal of the surface to be covered.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |