US3585153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory felt
Assignee: Societe Europeenne des Produits Refractaires SAS
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Filing: 1969-03-04
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Granted: 1971-06-15
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Expires: 1989-03-04
Abstract
Abstract A REFRACTORY FELT AND METHOD OF MAKING SAME COMPRISING PREPARING A WEB OF SUBSTANTIALLY INSOLUBLE REFRACTORY MINERAL FIBERS HAVING A LARGE SPECIFIC SURFACE AND TREATING THE WEB BY CONTINUOUSLY ROLLING AT ELEVATED TEMPERATURES SUCH THAT THE FIBERS SINTER TOGETHER WHERE THEY CONTACT.
Inventors
- 👤 Jean-Pierre Kiehl
- 👤 Gabriel Pupier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:38
CPC Classifications
C; C04; C04B; C04B30/00; C04B30/02; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62236; Y; Y10; Y10S; Y10S264/00; Y10S264/19
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |