US2539019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand separator
Assignee: Individual
•
Filing: 1947-03-27
•
Granted: 1951-01-23
•
Expires: 1967-03-27
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:02
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0012
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE566654C
Cited
FR402517A
Cited
US1333197A
Cited
US2025059A
Cited
US2229860A
Cited
US2308670A
Cited
US2301371A
Cited
US2381760A
Cited
US2425110A
Cited
US2450070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-22 | 1954-07-24 | 1955-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-22 | 1958-07-24 | 1959-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-22 | 1962-07-24 | 1963-01-23 | $7700.00 | Window Closed / Lapsed |