Patent US3389536A successfully refreshed from Google Patents.
US3389536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion treater tank
Assignee: Rheem Manufacturing Co
•
Filing: 1966-09-27
•
Granted: 1968-06-25
•
Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Hendrix R Bull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:40
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/34; E21B43/35
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2420115A
Cited
US2713919A
Cited
US2786543A
Cited
US2783854A
Cited
US2825422A
Cited
US2910136A
Cited
US3009536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |