US3064735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead assembly lock-down apparatus
Assignee: Shell USA Inc
•
Filing: 1959-08-17
•
Granted: 1962-11-20
•
Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 Richard J Bauer
- 👤 John A Haeber
- 👤 Lloyd G Otteman
- 👤 Raymond F Perner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/047; E21B23/00; E21B23/08; E21B23/12; E21B33/035; E21B33/037
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2590688A
Cited
US2532341A
Cited
US2862560A
Cited
US2903066A
Cited
US2859773A
Cited
US2874784A
Cited
US2889886A
Cited
US2962096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |