US2963161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Individual
•
Filing: 1959-01-28
•
Granted: 1960-12-06
•
Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:00
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/04; B01D33/044; B01D33/048; B01D33/056; B01D33/70; B01D33/74; B01D33/745; Y; Y10; Y10S; Y10S210/00; Y10S210/03
Claims Analysis
Total Claims: 0
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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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |