US3833968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic card clothing
Assignee: Toyota Central R&D Labs Inc
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Filing: 1972-03-06
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Granted: 1974-09-10
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Expires: 1992-03-06
Abstract
Abstract When combing yarn, and particularly synthetic yarn, the metallic card clothing wire has a short life. To extent the life of the card clothing wire, a hard layer selected from a group consisting of vanadium carbide, chromium carbide, tungsten carbide, molybdenum carbide, niobium carbide, tantalum carbide, titanium carbide, zirconium carbide, hafnium carbide and iron boride is difused onto the steel. This hard layer has a smooth working surface and a uniform thickness in the range of from about 8 to 20 microns.
Inventors
- 👤 T Arai
- 👤 M Mizutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
B; B21; B21F; B21F45/00; B21F45/10; D; D01; D01G; D01G15/00; D01G15/84; D01G15/88; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
The metallic card clothing wire as claimed in claim 1 wherein said diffused hard layer has a thickness of about 8 microns.
References Cited (Backward Citations)
US2732321A
Cited
US2872348A
Cited
US3387338A
Cited
FR1551309A
Cited
US3634145A
Cited
US3671297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |