US2799398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating liquids from sludges
Assignee: Individual
•
Filing: 1953-04-24
•
Granted: 1957-07-16
•
Expires: 1973-04-24
Abstract
No abstract record available.
Inventors
- 👤 Heymann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:37
CPC Classifications
C; C02; C02F; C02F11/00; C02F11/12; C02F11/121; B; B01; B01D; B01D35/00; B01D35/20; B01D37/00; B01D37/02; B07; B07B; B07B1/00; B07B1/46
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |