US3426908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal vacuum filter
Assignee: Eimco Corp
•
Filing: 1967-09-01
•
Granted: 1969-02-11
•
Expires: 1987-09-01
Abstract
No abstract record available.
Inventors
- 👤 Steven S Davis
- 👤 George Slajchert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:02
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/04; B01D33/056; B01D33/70; B01D33/72; B01D33/74; B01D33/745
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1793449A
Cited
US2101042A
Cited
US2314294A
Cited
US2377252A
Cited
US2572869A
Cited
US2873028A
Cited
US2963161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |