US3679443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mineral wool made from silicate glass comprising iron oxides
Assignee: Saint Gobain Isover G+H AG
•
Filing: 1969-12-17
•
Granted: 1972-07-25
•
Expires: 1989-12-17
Abstract
Abstract TEMPERATURE AND ACID RESISTANT MINERAL WOOL, FIBERS, FILAMENTS AND THE LIKE COMPRISING THE GLASS FORMING OXIDES SIO2 AND AL2O3, MELTABLE IRON OXIDES IN AN AMOUNT OF AT LEAST 18 WT. PERCENT AND FROM 0 TO 5 WT. PERCENT OF ALKALI METAL AND/OR ALKALINE EARTH METAL OXIDES.
Inventors
- 👤 Fridolin Mechel
- 👤 Hans Kummermehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/06; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |