US3450257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of clay
Assignee: Imerys Minerals Ltd
•
Filing: 1967-11-15
•
Granted: 1969-06-17
•
Expires: 1987-11-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin Kenneth Cundy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:03
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/04; C04B33/06; B; B03; B03D; B03D1/00; B03D1/001; B03D1/002; B03D1/004; B03D1/008; B03D1/02; B03D1/06; C04B33/10; C04B33/30; B03D2201/00; B03D2201/007; B03D2201/02; B03D2201/04; B03D2203/00; B03D2203/02; B03D2203/04; Y; Y10; Y10S; Y10S209/00; Y10S209/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1029579A
Cited
US2105826A
Cited
US2249569A
Cited
US2249570A
Cited
US2569680A
Cited
US2661842A
Cited
US2861687A
Cited
US2894628A
Cited
US2990958A
Cited
US3164549A
Cited
US3353668A
Cited
US3337048A
Cited
US3224582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |