Patent US3468520A successfully refreshed from Google Patents.
US3468520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination agitation and transfer unit for suspended cells
Assignee: Wyeth Holdings LLC
•
Filing: 1967-05-12
•
Granted: 1969-09-23
•
Expires: 1987-05-12
Abstract
No abstract record available.
Inventors
- 👤 William James Duryea
- 👤 George Spencer Bott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:35
CPC Classifications
B; B01; B01F; B01F31/00; B01F31/44; B01F31/445
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US780621A
Cited
US2084651A
Cited
US2660518A
Cited
US2829931A
Cited
US2859020A
Cited
US2958517A
Cited
US3182970A
Cited
US3368723A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |