US4162301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible microcrystalline zirconium carbide fabric
Assignee: Union Carbide Corp
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Filing: 1973-10-16
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Granted: 1979-07-24
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Expires: 1993-10-16
Abstract
Abstract Flexible metal carbide fabrics are produced by a process that involves the steps of:
Inventors
- 👤 Bernard H. Hamling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:28
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/928; C01B32/949; C01B32/956; C01B32/963; C01B32/97; C01B32/991; C01P; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/10; C01P2006/32; C01P2006/33; C01P2006/34; C01P2006/80; C01P2006/90; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A flexible microcrystalline zirconium carbide fabric which can be folded upon itself without creasing or breaking, the individual fibers of which have: (a) a tensile strength greater than 100,000 pounds per square inch, (b) a crystal grain size of less than two tenths of a fiber diameter, said zirconium carbide having a melting point of at least about 3300° F.
Claim 2
Dependent Claim
60 words
A flexible microcrystalline zirconium carbide fabric which can be folded upon itself without creasing or breaking, the individual fibers of which have: (a) a tensile strength greater than 100,000 pounds per square inch, (b) a crystal grain size of less than two tenths of a fiber diameter, said zirconium carbide having a melting point of at least about 3300° F.
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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) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |