US2448212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating filter
Assignee: HARRY E LERNER
•
Filing: 1944-07-21
•
Granted: 1948-08-31
•
Expires: 1964-07-21
Abstract
No abstract record available.
Inventors
- 👤 Clarence L Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:28
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1037
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) | 1951-08-31 | 1952-03-01 | 1952-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-31 | 1956-03-01 | 1956-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-31 | 1960-03-01 | 1960-08-31 | $7700.00 | Window Closed / Lapsed |