US3997301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tin-electroplated steel sheets and method for making them
Assignee: JFE Steel Corp
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Filing: 1976-02-11
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Granted: 1976-12-14
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Expires: 1996-02-11
Abstract
Abstract A tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property is disclosed. The tin-electroplated steel sheet comprises a cold rolled low carbon steel sheet substrate, a layer consisting of 1 to 15 g/m 2 of electroplated tin, said layer being electroplated upon at least one side surface of said substrate and a layer consisting of 0.0071 to 0.71 g/m 2 of zinc, said layer being plated upon the tin layer.
Inventors
- 👤 Takahisa Yoshihara
- 👤 Hajime Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:02
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/10; C25D11/00; C25D11/38; C25D5/48; C25D5/627; Y; Y10; Y10S; Y10S205/00; Y10S205/917; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12708; Y10T428/12722; Y10T428/12771; Y10T428/12785; Y10T428/12792
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
69 words
A tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising a cold rolled low carbon steel sheet substrate, a layer consisting of 1 to 15 g/m 2 of electroplated tin, said layer being electroplated upon at least one side surface of said substrate and a layer consisting of 0.0071 to 0.71 g/m 2 of zinc, said layer being plated upon said tin layer.
Claim 2
Dependent Claim
69 words
A tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising a cold rolled low carbon steel sheet substrate, a layer consisting of 1 to 15 g/m 2 of electroplated tin, said layer being electroplated upon at least one side surface of said substrate and a layer consisting of 0.0071 to 0.71 g/m 2 of zinc, said layer being plated upon said tin layer.
Claim 3
Dependent Claim
26 words
The tin-electroplated steel sheet as claimed in claim 1, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.355 g/m 2 .
Claim 4
Dependent Claim
26 words
The tin-electroplated steel sheet as claimed in claim 1, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.142 g/m 2 .
Claim 5
Dependent Claim
34 words
The tin-electroplated steel sheet as claimed in claim 1 and further comprising a film consisting of hydrate of chromium oxide containing less than 2.0 μg/cm 2 of chromium and superimposed upon said zinc layer.
Claim 6
Independent Claim
74 words
A method of manufacturing a tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising the steps of electroplating at least one side surface of a cold rolled low carbon steel sheet substrate with 1 to 15 g/m 2 of tin to provide a tin coating, and plating said tin coating with 0.0071 to 0.71 g/m 2 of zinc to provide a zinc coating superimposed upon said tin coating.
Claim 7
Independent Claim
74 words
A method of manufacturing a tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising the steps of electroplating at least one side surface of a cold rolled low carbon steel sheet substrate with 1 to 15 g/m 2 of tin to provide a tin coating, and plating said tin coating with 0.0071 to 0.71 g/m 2 of zinc to provide a zinc coating superimposed upon said tin coating.
Claim 8
Dependent Claim
24 words
The method as claimed in claim 5, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.355 g/m 2 .
Claim 9
Dependent Claim
24 words
The method as claimed in claim 5, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.142 g/m 2 .
Claim 10
Dependent Claim
41 words
The method as claimed in claim 5 and further comprising a step of chemically treating said tin-electroplated and zinc plated steel sheet to provide a film consisting of hydrate of chromium oxide containing less than 2.0 μg/cm 2 of chromium thereon.
Claim 11
Dependent Claim
21 words
The method as claimed in claim 5 and further comprising a step of reflowing said tin-electroplated and zinc plated steel sheet.
Claim 12
Dependent Claim
24 words
The method as claimed in claim 9, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.355 g/m 2 .
Claim 13
Dependent Claim
24 words
The method as claimed in claim 9, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.142 g/m 2 .
Claim 14
Dependent Claim
42 words
The method as claimed in claim 9 and further comprising a step of chemically treating said tin-electroplated, zinc plated and reflown steel sheet to provide a film consisting of hydrate of chromium oxide containing less than 2.0 μg/cm 2 of chromium thereon.
Claim 15
Independent Claim
74 words
A method of manufacturing a tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising the steps of electroplating at least one side surface of a cold rolled low carbon steel sheet substrate with 1 to 15 g/m 2 of tin to provide a tin coating, and reflowing and then plating with 0.0071 to 0.71 g/m 2 of zinc to provide a zinc coating upon the reflowed tin coating.
Claim 16
Independent Claim
74 words
A method of manufacturing a tin-electroplated steel sheet having an excellent sulfur resisting property and excellent smudge resisting property, comprising the steps of electroplating at least one side surface of a cold rolled low carbon steel sheet substrate with 1 to 15 g/m 2 of tin to provide a tin coating, and reflowing and then plating with 0.0071 to 0.71 g/m 2 of zinc to provide a zinc coating upon the reflowed tin coating.
Claim 17
Dependent Claim
24 words
The method as claimed in claim 13, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.355 g/m 2 .
Claim 18
Dependent Claim
24 words
The method as claimed in claim 13, wherein said amount of zinc plated upon said tin layer is 0.0355 to 0.142 g/m 2 .
Claim 19
Dependent Claim
42 words
The method as claimed in claim 13 and further comprising a step of chemically treating said tin-electroplated, reflown and zinc plated steel sheet to provide a film consisting of hydrate of chromium oxide containing less than 0.2 μg/cm 2 of chromium thereon.
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) | 1979-12-14 | 1980-06-14 | 1980-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-14 | 1984-06-14 | 1984-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-14 | 1988-06-14 | 1988-12-14 | $7700.00 | Window Closed / Lapsed |