US3482685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the whiteness of clays
Assignee: Imerys Minerals Ltd
•
Filing: 1966-04-04
•
Granted: 1969-12-09
•
Expires: 1986-04-04
Abstract
No abstract record available.
Inventors
- 👤 Peter James Malden
- 👤 William Windle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:26
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/40; B; B03; B03C; B03C1/00; B03C1/02; B03C1/035; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; C04B33/30; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/60; C01P2004/61; Y; Y10; Y10S; Y10S264/00; Y10S264/39
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US90565A
Cited
US2088364A
Cited
US2074085A
Cited
US2156125A
Cited
AT188289B
Cited
US2990958A
Cited
US3021007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-08 | 1973-06-09 | 1973-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-08 | 1977-06-09 | 1977-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-08 | 1981-06-09 | 1981-12-09 | $7700.00 | Window Closed / Lapsed |