US3186103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing liquid from a filter cake used in a vacuum process
Assignee: INST NAT de l IND CHARBONNIERE
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Filing: 1962-01-16
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Granted: 1965-06-01
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Expires: 1982-01-16
Abstract
No abstract record available.
Inventors
- 👤 Burton Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/58; B01D33/62; B01D33/64; B01D33/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |