US4298661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treated steel materials
Assignee: Nippon Steel Corp
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Filing: 1979-06-01
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Granted: 1981-11-03
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Expires: 1999-06-01
Abstract
Abstract A surface treated steel materials coated with manganese having a film of MmOOH (manganic hydroxide) formed thereon, which show excellent corrosion resistance, workability and weldability. The surface treated steel materials may be further coated with zinc as a base coating underlying the manganese coating or further coated with a coating of at least one selected from the group consisting of P, B, Si, Cu, Mn, Cr, Ni, Co, Fe, Zn, Al, Ca, Mg, Ti, Pb, Sn, inorganic carbon and their compounds and still further coated with an organic coating. The film of MmOOH (manganic hydroxide) is formed by a treatment in an aqueous solution containing Cr6+.
Inventors
- 👤 Teruo Ikeno
- 👤 Satoshi Kado
- 👤 Saburo Ayusawa
- 👤 Hironobu Kawasaki
- 👤 Takashi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:24
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/48; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24; C23C28/00; C23C28/30; C23C28/32; C23C28/322; C23C28/3225; C23C28/34; C23C28/345; C23C30/00; C23F; C23F15/00; C25D21/00; C25D21/08; C25D21/12; C25D21/14; C25D3/00; C25D3/02; C25D3/54; C25D5/34; C25D5/36; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12556; Y10T428/12569; Y10T428/12583; Y10T428/1259; Y10T428/12611; Y10T428/12771; Y10T428/12778; Y10T428/12785; Y10T428/12792; Y10T428/12799
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
26 words
A surface treated steel material comprising a manganese coating on the steel material and a film consisting essentially of MnOOH (manganic hydroxide) on the manganese coating.
Claim 2
Dependent Claim
26 words
A surface treated steel material comprising a manganese coating on the steel material and a film consisting essentially of MnOOH (manganic hydroxide) on the manganese coating.
Claim 3
Dependent Claim
38 words
A surface treated steel material according to claim 1, in which the manganese coating is in a thickness not thicker than 8μ and the film of manganic hydroxide is in a thickness ranging from 50 to 300 A.
Claim 4
Dependent Claim
23 words
A surface treated steel material according to claim 1, which further comprises a zinc coating between the base steel and the manganese coating.
Claim 5
Dependent Claim
23 words
A surface treated steel material according to claim 3, in which the zinc coating is in a thickness ranging from 0.4μ to 8.4μ.
Claim 6
Dependent Claim
57 words
A surface treated steel material according to claim 1, which further comprises a surface coating on the film of the manganic hydroxide, said surface coating containing at least one member selected from the group consisting of P, B, Si, Cu, Mn, Cr, Ni, Co, Fe, Zn, Al, Ca, Mg, Ti, Pb, Sn, inorganic C, and their compounds.
Claim 7
Dependent Claim
19 words
A surface treated steel material according to claim 5, in which the surface coating further contains an organic resin.
Claim 8
Dependent Claim
19 words
A surface treated steel material according to claim 5, which further comprises an organic coating on the surface coating.
Claim 9
Dependent Claim
19 words
A surface treated steel material according to claim 6, which further comprises an organic coating on the surface coating.
Claim 10
Dependent Claim
34 words
A surface treated steel material according to claim 3 which further comprises a zinc coating between the base steel and the manganese coating, the zinc coating having a thickness ranging from 0.4μ to 8.4μ.
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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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |