Patent US3162128A successfully refreshed from Google Patents.
US3450204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well casing hanger
Assignee: Baker Hughes Holdings LLC
•
Filing: 1967-09-06
•
Granted: 1969-06-17
•
Expires: 1987-09-06
Abstract
No abstract record available.
Inventors
- 👤 Cicero C Brown
- 👤 James D Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:24
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/06; E21B33/00; E21B33/10; E21B33/12; E21B33/126; E21B43/00; E21B43/02; E21B43/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |