Patent US2764293A successfully refreshed from Google Patents.
US2764293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed vacuum separator
Assignee: Individual
•
Filing: 1952-12-03
•
Granted: 1956-09-25
•
Expires: 1972-12-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Forsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:54
CPC Classifications
B; B02; B02B; B02B1/00; B02B1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US106048A
Cited
US1128850A
Cited
US1068162A
Cited
US1252273A
Cited
GB320207A
Cited
FR711465A
Cited
US2102880A
Cited
US2040196A
Cited
US2254430A
Cited
US2404414A
Cited
US2635753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |