US2485497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead equipment
Assignee: Vetco Gray LLC
•
Filing: 1944-12-26
•
Granted: 1949-10-18
•
Expires: 1964-12-26
Abstract
No abstract record available.
Inventors
- 👤 Lemley John
- 👤 Erwin F Hill
- 👤 Robert A Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:38
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/0422; E21B2200/00; E21B2200/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1973809A
Cited
US2129433A
Cited
US2228555A
Cited
US2207469A
Cited
US2350867A
Cited
US2313169A
Cited
US2306102A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |