US4095014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear-resistant zinc articles
Assignee: Individual
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Filing: 1976-07-06
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Granted: 1978-06-13
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Expires: 1996-07-06
Abstract
Abstract A wear-resistant article comprises a zinc base metal having a substantially continuous, hard chromium skin layer on at least one surface thereof and a chromium-enriched subsurface layer of the zinc base metal situated immediately below the chromium skin layer. The chromium-enriched subsurface layer has a gradually decreasing chromium content in a direction inwardly away from the skin layer and is at least as thick as the skin layer. The wear-resistant article of this invention is produced by direct electrodeposition of chromium onto the zinc base metal from a self-regulating bath under controlled conditions.
Inventors
- 👤 Richard C. Iosso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:01
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12806; Y10T428/12826; Y10T428/12847
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
93 words
An article of manufacture which comprises a zinc base metal having a substantially continuous, wear-resistant chromium skin layer on at least one surface thereof and a chromium-enriched subsurface layer of said zinc base metal immediately below said chromium skin layer; said subsurface layer containing at least about 0.1 percent by weight chromium, having a gradually decreasing chromium content in a direction inwardly away from said skin layer, being at least as thick as said skin layer, and having a hardness greater than the hardness of said zinc base metal below said subsurface layer.
Claim 2
Dependent Claim
93 words
An article of manufacture which comprises a zinc base metal having a substantially continuous, wear-resistant chromium skin layer on at least one surface thereof and a chromium-enriched subsurface layer of said zinc base metal immediately below said chromium skin layer; said subsurface layer containing at least about 0.1 percent by weight chromium, having a gradually decreasing chromium content in a direction inwardly away from said skin layer, being at least as thick as said skin layer, and having a hardness greater than the hardness of said zinc base metal below said subsurface layer.
Claim 3
Dependent Claim
25 words
The article of manufacture in accordance with claim 1 wherein the chromium content of said subsurface layer is at least about 0.4 percent by weight.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |