Patent US3052299A successfully refreshed from Google Patents.
US3052299A
Expired / Lapsed
US
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Underwater wellhead with remotelydetachable flow line
Assignee: Shell USA Inc
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Filing: 1959-08-25
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Granted: 1962-09-04
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Expires: 1979-08-25
Abstract
No abstract record available.
Inventors
- 👤 Ronald L Geer
- 👤 Lloyd G Otteman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/01; E21B43/013; Y; Y10; Y10S; Y10S285/00; Y10S285/92
Claims Analysis
Total Claims: 0
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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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |