US3391786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering device and method
Assignee: Individual
•
Filing: 1965-07-23
•
Granted: 1968-07-09
•
Expires: 1985-07-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph D Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:16
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/28; B01D33/00; B01D33/04; B01D33/58; B01D33/62; B01D33/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191416946A
Cited
US1890251A
Cited
US1914742A
Cited
US2095504A
Cited
US2370138A
Cited
US3159574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |