US2084484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for discharging acid from a centrifuge
Assignee: Standard Oil Development Co
•
Filing: 1935-11-22
•
Granted: 1937-06-22
•
Expires: 1955-11-22
Abstract
No abstract record available.
Inventors
- 👤 David F Edwards
- 👤 Arthur M Willson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:06
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/12; Y; Y10; Y10S; Y10S494/00; Y10S494/901
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) | 1940-06-21 | 1940-12-21 | 1941-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-21 | 1944-12-21 | 1945-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-21 | 1948-12-21 | 1949-06-22 | $7700.00 | Window Closed / Lapsed |