US2551175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter cloth
Assignee: Individual
•
Filing: 1949-11-04
•
Granted: 1951-05-01
•
Expires: 1969-11-04
Abstract
No abstract record available.
Inventors
- 👤 Edmund G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:24
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/08; B01D39/083; B01D39/086; B01D2239/00; B01D2239/04; B01D2239/0414; B01D2239/0428; B01D2239/06; B01D2239/065; B01D2239/0654; Y; Y10; Y10S; Y10S162/00; Y10S162/903; Y10S55/00; Y10S55/45
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1000405A
Cited
US1696367A
Cited
US2006543A
Cited
US2229582A
Cited
US2215938A
Cited
US2252554A
Cited
US2313904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |