US3057481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrugated filter and method of forming the same
Assignee: Pall Corp
•
Filing: 1958-06-12
•
Granted: 1962-10-09
•
Expires: 1978-06-12
Abstract
No abstract record available.
Inventors
- 👤 David B Pall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:27
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/10; B01D39/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T29/49604; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12361; Y10T428/12389; Y10T428/12403; Y10T428/1241; Y10T428/12444; Y10T428/12451
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |