US2867324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus
Assignee: Individual
•
Filing: 1956-03-12
•
Granted: 1959-01-06
•
Expires: 1976-03-12
Abstract
No abstract record available.
Inventors
- 👤 Hirs Gene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:46
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/50; B01D29/52; B01D29/60; B01D29/606; B01D29/88; B01D29/90; B01D29/92; B01D2201/00; B01D2201/34; B01D2201/345
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US920909A
Cited
US915616A
Cited
US1632760A
Cited
US1549840A
Cited
US1651495A
Cited
US1879474A
Cited
US1982639A
Cited
US2152900A
Cited
US2303262A
Cited
US2665812A
Cited
US2675129A
Cited
US2691446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |