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US2754005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus
Assignee: Individual
•
Filing: 1953-11-20
•
Granted: 1956-07-10
•
Expires: 1973-11-20
Abstract
No abstract record available.
Inventors
- 👤 Charles M Tursky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:59
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/44; B01D29/48; B01D29/50; B01D29/52; B01D29/88; B01D29/90; B01D29/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US671003A
Cited
US1812773A
Cited
US1877157A
Cited
US2100266A
Cited
GB632412A
Cited
US2600458A
Cited
US2667271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-10 | 1960-01-09 | 1960-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-10 | 1964-01-09 | 1964-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-10 | 1968-01-09 | 1968-07-10 | $7700.00 | Window Closed / Lapsed |