US3106528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cartridge and method and means for making the same
Assignee: Individual
•
Filing: 1957-03-25
•
Granted: 1963-10-08
•
Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Roland H Burks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:59
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D2201/00; B01D2201/18; B01D2201/182; B01D2239/00; B01D2239/04; B01D2239/0464; B01D2239/0471; B01D2239/0492; B01D2239/06; B01D2239/065; B01D2239/0654; B01D2239/0681; B01D2239/10
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) | 1966-10-07 | 1967-04-08 | 1967-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-07 | 1971-04-08 | 1971-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-07 | 1975-04-08 | 1975-10-08 | $7700.00 | Window Closed / Lapsed |