Patent US5434985A successfully refreshed from Google Patents.
Patent US3168142A successfully refreshed from Google Patents.
US3168142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wellhead base assembly
Assignee: Shell USA Inc
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Filing: 1961-12-28
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Granted: 1965-02-02
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Bruce J Watkins
- 👤 Glenn D Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:20
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AN OPERATING BASE ASSEMBLY ADATPED TO BE REMOVABLY POSITIONED ON AT LEAST A PORTION OF A WELLHEAD ASSEMBLY EXTENDING UPWARDLY FROM AN UNDERWATER WELL, SAID BASE ASSEMBLY COMPRISING (A) A HOUSING MEMBER HAVING AN OPENING EXTENDING VERTICALLY THERETHROUGH, (B) STABILIZER MEANS FOR SAID BASE ASSEMBLY CARRIED BY SAID HOUSING MEMBER AND ADAPTED TO ENGAGE THE OUTER SURFACE OF A PORTION OF SAID WELLHEAD ASSEMBLY, (C) SHOULDER MEANS CARRIED ON THE INNER WALL OF SAID HOUSING MEMBER FOR SEATING ON SAID WELLHEAD ASSEMBLY, AND (D) TRACK MEANS FIXEDLY SECURED TO SAID HOUSING MEMBER AND DISPOSED RADIALLY OUTWARDLY THEREFROM, SAID TRACK MEANS HAVING A SMOOTH UNINTERRUPTED UPPER SURFACE EXTENDING ENTIRELY AROUND SAID HOUSING MEMBER.
Claim 2
Dependent Claim
112 words
AN OPERATING BASE ASSEMBLY ADATPED TO BE REMOVABLY POSITIONED ON AT LEAST A PORTION OF A WELLHEAD ASSEMBLY EXTENDING UPWARDLY FROM AN UNDERWATER WELL, SAID BASE ASSEMBLY COMPRISING (A) A HOUSING MEMBER HAVING AN OPENING EXTENDING VERTICALLY THERETHROUGH, (B) STABILIZER MEANS FOR SAID BASE ASSEMBLY CARRIED BY SAID HOUSING MEMBER AND ADAPTED TO ENGAGE THE OUTER SURFACE OF A PORTION OF SAID WELLHEAD ASSEMBLY, (C) SHOULDER MEANS CARRIED ON THE INNER WALL OF SAID HOUSING MEMBER FOR SEATING ON SAID WELLHEAD ASSEMBLY, AND (D) TRACK MEANS FIXEDLY SECURED TO SAID HOUSING MEMBER AND DISPOSED RADIALLY OUTWARDLY THEREFROM, SAID TRACK MEANS HAVING A SMOOTH UNINTERRUPTED UPPER SURFACE EXTENDING ENTIRELY AROUND SAID HOUSING MEMBER.
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |