Patent US3704147A successfully refreshed from Google Patents.
US3704147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous inorganic materials
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1970-04-30
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Granted: 1972-11-28
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Expires: 1990-04-30
Abstract
Abstract FIBRES ON AN INORGANIC MATERIAL SUCH AS ZIRCONIA OR ALUMINA ARE MADE BY PREPARING A HIGHLY VISCOUS BUT TREACLY SOL OF THE MATERIAL AND SPRAY DRYING THE SOL UNDER CONDITIONS WHICH FAVOUR THE FORMATION OF FIBRES AS DISTINCT FROM ROUNDED PARTICLES.
Inventors
- 👤 Clarence James Hardy
- 👤 Michael Joseph Holdoway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:14
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/6225; C01; C01B; C01B32/00; C01B32/90; C03; C03B; C03B37/00; C04B35/62236; C01P; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/11; C01P2006/60; Y; Y02; Y02P; Y02P40/00; Y02P40/50; Y02P40/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |