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Patent US3064735A successfully refreshed from Google Patents.
US3064735A
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Wellhead assembly lock-down apparatus
Assignee: Shell USA Inc
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Filing: 1959-08-17
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Granted: 1962-11-20
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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 20:43
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
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References Cited (Backward Citations)
US2590688A
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US2532341A
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US2862560A
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US2903066A
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US2859773A
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US2874784A
Cited
US2889886A
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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 |