US2554968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous pressure separating device operating in multiple stages
Assignee: Individual
•
Filing: 1945-08-06
•
Granted: 1951-05-29
•
Expires: 1965-08-06
Abstract
No abstract record available.
Inventors
- 👤 Robert M Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
B; B30; B30B; B30B9/00; B30B9/02; B30B9/24; B01; B01D; B01D33/00; B01D33/04; B01D33/042; B01D33/044; B01D33/048; B01D33/06; B01D33/073; B01D33/35; B01D33/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US457217A
Cited
US2029081A
Cited
US1730590A
Cited
US1646653A
Cited
US2112869A
Cited
US2229582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |