US2427092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scraper structure for liquid treatment tanks
Assignee: Graver Energy Systems Inc
•
Filing: 1944-08-26
•
Granted: 1947-09-09
•
Expires: 1964-08-26
Abstract
No abstract record available.
Inventors
- 👤 Ewald A Kamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:28
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0018; B01D21/01; B01D21/18; B01D21/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-08 | 1951-03-10 | 1951-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-08 | 1955-03-10 | 1955-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-08 | 1959-03-10 | 1959-09-09 | $7700.00 | Window Closed / Lapsed |