US3487923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating aqueous suspensions of solid particles
Assignee: Canadian Patents and Development Ltd
•
Filing: 1968-08-28
•
Granted: 1970-01-06
•
Expires: 1988-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jan Visman
- 👤 Lawson S Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:52
CPC Classifications
B; B04; B04C; B04C1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2849117A
Cited
US819171A
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US2377524A
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US2700468A
Cited
US2799208A
Cited
US2910178A
Cited
US3084798A
Cited
US3353673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |