US2762437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for separating fluids having different specific gravities
Assignee: BIVINGS
•
Filing: 1955-01-18
•
Granted: 1956-09-11
•
Expires: 1975-01-18
Abstract
No abstract record available.
Inventors
- 👤 Egan Stephen Louis
- 👤 Bivings John Alexander
- 👤 Frederick W Willson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:00
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/38; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006
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) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |