US4043623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant filament wear guides and method of making the same
Assignee: Surface Technology Corp
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Filing: 1975-08-22
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Granted: 1977-08-23
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Expires: 1995-08-22
Abstract
Abstract Filament wear guides which are characterized by excellent resistance to abrasive filament wear. Also, the method of their fabrication. A chromium surface on a substrate is controllably oxidized or nitrided and oxidized. Such oxidation or nitriding plus oxidizing is accomplished thermally. The coatings consist of oxide alone, or oxide formed in conjunction with the nitride depending upon the treatment employed. Resulting chromium oxide or oxy-nitride surface layer is nonparticulate and substantially impervious.
Inventors
- 👤 John J. Rausch
- 👤 Ray J. Van Thyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:46
CPC Classifications
D; D04; D04B; D04B15/00; D04B15/38; D04B15/54; B; B65; B65H; B65H57/00; B65H57/24; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
A filament wear guide consisting essentially of: a. a substrate member in the form of a wear guide; b. a chromium layer on said substrate member at least in the area thereof to be contacted by a filament passing thereover, said chromium layer ranging in thickness from 5 microinches to 5 mils; and c. a composite structure on the surface of and an integral part of said chromium layer, said composite structure being nonparticulate and continuous and being the reaction product of said chromium and a material selected from the group consisting of nitrogen and oxygen and mixtures thereof.
Claim 2
Dependent Claim
99 words
A filament wear guide consisting essentially of: a. a substrate member in the form of a wear guide; b. a chromium layer on said substrate member at least in the area thereof to be contacted by a filament passing thereover, said chromium layer ranging in thickness from 5 microinches to 5 mils; and c. a composite structure on the surface of and an integral part of said chromium layer, said composite structure being nonparticulate and continuous and being the reaction product of said chromium and a material selected from the group consisting of nitrogen and oxygen and mixtures thereof.
Claim 3
Dependent Claim
27 words
The filament wear guide as defined in claim 1 and wherein said surface consists of a chromium nitride zone upon which is present a chromium oxide zone.
Claim 4
Dependent Claim
40 words
The filament wear guide as defined in claim 1 wherein said surface consists of a chromium nitride zone upon which is present a chromium oxide zone and the chromium interlayer and surface combined is from 0.1 to 4 mils thick.
Claim 5
Dependent Claim
27 words
The filament wear guide as defined in claim 1 and wherein said surface consists of a chromium nitride zone upon which is present a chromium oxy-nitride zone.
Claim 6
Dependent Claim
40 words
The filament wear guide as defined in claim 1 wherein said surface consists of a chromium nitride zone upon which is present a chromium oxy-nitride zone and the chromium interlayer and surface combined is from 0.1 to 4 mils thick.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |