US2983383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter
Assignee: US Hoffman Machinery Corp
•
Filing: 1956-10-22
•
Granted: 1961-05-09
•
Expires: 1976-10-22
Abstract
No abstract record available.
Inventors
- 👤 Charles A Wallace
- 👤 Henry L Risko
- 👤 El-Hindi Ahmad Mohamed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:36
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/10; B23Q11/1069; B24; B24B; B24B57/00; C; C09; C09K; C09K5/00; B01; B01D; B01D29/00; B01D29/09
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US864828A
Cited
US1793449A
Cited
US2314294A
Cited
US2270938A
Cited
US2665812A
Cited
US2675129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |