US2218339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and oil recharge
Assignee: F W MANNING Co Ltd
•
Filing: 1936-09-22
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Granted: 1940-10-15
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Expires: 1956-09-22
Abstract
No abstract record available.
Inventors
- 👤 Fred W Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/04; B01D27/005; B01D27/02; B01D27/06; B01D37/00; B01D37/02; Y; Y10; Y10S; Y10S206/00; Y10S206/813; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |