US3540588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cleaning liquid
Assignee: Barnes Drill Co
•
Filing: 1967-12-13
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Granted: 1970-11-17
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Expires: 1987-12-13
Abstract
No abstract record available.
Inventors
- 👤 Mark R Estabrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:04
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0018; B01D21/02; B01D21/04; B01D21/18; B01D21/24; B01D21/2444; B01D21/245; B01D21/2488; B01D21/26; B01D21/267; B01D2221/00; B01D2221/14
Claims Analysis
Total Claims: 0
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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) | 1973-11-16 | 1974-05-18 | 1974-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-16 | 1978-05-18 | 1978-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-16 | 1982-05-18 | 1982-11-17 | $7700.00 | Window Closed / Lapsed |