Patent US188625A successfully refreshed from Google Patents.
Patent US2768754A successfully refreshed from Google Patents.
US2768754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded sawdust filter medium
Assignee: Individual
•
Filing: 1948-08-12
•
Granted: 1956-10-30
•
Expires: 1968-08-12
Abstract
No abstract record available.
Inventors
- 👤 Southwick W Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01D29/00; B01D29/11; B01D29/111; B01D29/31; B01D29/33; B01D29/333; B01D35/00; B01D35/14; B01D35/147; B01D2101/00; B01D2101/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1162244A
Cited
US1885066A
Cited
US1877864A
Cited
US1884366A
Cited
US1902461A
Cited
US2007052A
Cited
US2077512A
Cited
US2063086A
Cited
US2140189A
Cited
US2337574A
Cited
US2237148A
Cited
US2398284A
Cited
US2349469A
Cited
US2468328A
Cited
US2554814A
Cited
US2563897A
Cited
US2539768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |