US2263167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sedimentation
Assignee: Dorr Co
•
Filing: 1939-07-22
•
Granted: 1941-11-18
•
Expires: 1959-07-22
Abstract
No abstract record available.
Inventors
- 👤 John V N Dorr
- 👤 William C Weber
- 👤 George M Darby
- 👤 Elliott J Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:47
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/06; B01D21/0003; B01D21/0024; B01D21/18; B01D21/24; B01D21/2405; B01D21/2416; B01D21/2427; B01D21/2444; B01D21/245; B01D21/30; B01D21/307; B01D21/34
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) | 1944-11-17 | 1945-05-19 | 1945-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-11-17 | 1949-05-19 | 1949-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-11-17 | 1953-05-19 | 1953-11-18 | $7700.00 | Window Closed / Lapsed |