US2945557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filtering mediums
Assignee: Individual
•
Filing: 1957-12-12
•
Granted: 1960-07-19
•
Expires: 1977-12-12
Abstract
No abstract record available.
Inventors
- 👤 Milton A Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:46
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D35/00; B01D35/10; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12444
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1700126A
Cited
US1883715A
Cited
US2463722A
Cited
US2463723A
Cited
US2479722A
Cited
US2619188A
Cited
US2782933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |