US2929464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat knit filter media
Assignee: Vernco Corp
•
Filing: 1959-05-18
•
Granted: 1960-03-22
•
Expires: 1979-05-18
Abstract
No abstract record available.
Inventors
- 👤 Lowell E Sprouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:11
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/10; B01D39/12; B01D46/00; B01D46/10; Y; Y10; Y10S; Y10S55/00; Y10S55/43
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) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |