Patent US3446349A successfully refreshed from Google Patents.
US3446349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for separating and recovering relatively coarse mineral particles and relatively fine mineral particles from a slurry containing said particles
Assignee: Bethlehem Steel Corp
•
Filing: 1966-03-16
•
Granted: 1969-05-27
•
Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 William Benzon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:53
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/28; B07B1/40; B01; B01D; B01D29/00; B01D29/01; B01D29/014; B01D29/62; B01D29/64; B01D29/6438; B01D29/6446
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US440883A
Cited
US557172A
Cited
CA469241A
Cited
US831681A
Cited
US882804A
Cited
US952562A
Cited
US1473745A
Cited
US2916142A
Cited
US3058591A
Cited
US3007574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |