Patent US3471017A successfully refreshed from Google Patents.
US3471017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering process and apparatus
Assignee: Individual
•
Filing: 1967-06-20
•
Granted: 1969-10-07
•
Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Peter Gabor Kalman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:28
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/10; B01; B01D; B01D29/00; B01D29/09; B01D29/096; B01D29/60; B01D29/608; B01D29/96; B01D33/00; B01D33/04; B01D33/056; B01D33/80; B01D33/801; B01D33/804; B01D33/809; B01D35/00; B01D35/18; B01D37/00; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/69; B29C48/692; B29C48/03; B29C48/07; B29C48/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |