Patent US2225955A successfully refreshed from Google Patents.
US3211223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underwater well completion
Assignee: Phillips Petroleum Co
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Filing: 1961-12-26
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Granted: 1965-10-12
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Robert S Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:44
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035; E21B33/037
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
AN UNDERWATER WELLHEAD ASSEMBLY COMPRISING A WELLHEAD, AN INVERTED BELL HOUSING LOCATED OVER SAID HEAD, SAID HOUSING BEING GENERALLY CIRCULAR IN HORIZONTAL DCROSS SECTION AND OPEN ON THE BOTTOM TO PROVIDE FREE ACCESS TO SAID HEAD, AND MEANS TO ATTACH SAID HOUSING TO SAID HEAD ECCENTRICALLY TO PROVIDE WORKING SPACE AROUND SAID ONE F SAID HEAD.
Claim 2
Dependent Claim
56 words
AN UNDERWATER WELLHEAD ASSEMBLY COMPRISING A WELLHEAD, AN INVERTED BELL HOUSING LOCATED OVER SAID HEAD, SAID HOUSING BEING GENERALLY CIRCULAR IN HORIZONTAL DCROSS SECTION AND OPEN ON THE BOTTOM TO PROVIDE FREE ACCESS TO SAID HEAD, AND MEANS TO ATTACH SAID HOUSING TO SAID HEAD ECCENTRICALLY TO PROVIDE WORKING SPACE AROUND SAID ONE F SAID HEAD.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |