US4687546B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of concentrating slurried kaolin
Assignee: Anglo American Clays Corp
•
Filing: 1985-07-19
•
Granted: 1996-06-04
•
Expires: 2005-07-19
Abstract
No abstract record available.
Inventors
- 👤 Mark S Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/28; B01D1/26; B28; B28C; B28C1/00; B28C1/02; B28C1/06; B28C1/08; B28C1/082; F; F26; F26B; F26B23/00; F26B23/001; F26B23/002; F26B23/004; F26B3/00; F26B3/18; F26B3/20; Y; Y02; Y02B; Y02B30/00; Y02B30/52; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S159/00; Y10S159/32; Y10S203/00; Y10S203/08
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) | 1999-06-04 | 1999-12-04 | 2000-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-04 | 2003-12-04 | 2004-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-04 | 2007-12-04 | 2008-06-04 | $7700.00 | Window Closed / Lapsed |