US3391681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aluminum and chromium sesquioxide fibers
Assignee: EIDP Inc
•
Filing: 1965-12-29
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Granted: 1968-07-09
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Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang A Westdorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:30
CPC Classifications
C; C01; C01G; C01G37/00; C01G37/02; C30; C30B; C30B25/00; C30B25/005; C30B29/00; C30B29/10; C30B29/16; C30B29/20; C01P; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2004/62; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |