US2445919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
mitchell
Assignee: —
•
Filing: —
•
Granted: 1948-07-27
•
Expires: 1965-07-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:21
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/12; B; B01; B01D; B01D1/00; B01D1/0011
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US393079A
Cited
US406868A
Cited
US1001937A
Cited
US1358383A
Cited
US1288400A
Cited
GB419952A
Cited
US2021991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |