US2395301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making filter members
Assignee: JESSE B HAWLEY
•
Filing: 1940-08-03
•
Granted: 1946-02-19
•
Expires: 1960-08-03
Abstract
No abstract record available.
Inventors
- 👤 Edward C Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
D; D21; D21J; D21J3/00; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01D2239/00; B01D2239/04; B01D2239/0407; Y; Y10; Y10S; Y10S210/00; Y10S210/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-02-18 | 1949-08-20 | 1950-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-18 | 1953-08-20 | 1954-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-18 | 1957-08-20 | 1958-02-19 | $7700.00 | Window Closed / Lapsed |