Patent US3476351A successfully refreshed from Google Patents.
US3239248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling and completing a well
Assignee: Cooper Industries LLC
•
Filing: 1962-01-18
•
Granted: 1966-03-08
•
Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 Marvin R Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:52
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/04; E21B33/043; Y; Y10; Y10S; Y10S285/00; Y10S285/92; Y10T; Y10T403/00; Y10T403/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
WELLHEAD EQUIPMENT, COMPRISING A HOUSING HAVING A BORE THERETHROUGH AND A RECESS ABOUT THE BORE, A BOWL IN THE BORE BENEATH THE RECESS, A CASING HANGER WITHIN THE RECESS, MEANS ON THE HOUSING FOR SUSPENDING THE HANGER AND MOVING IT INWARDLY OF THE BORE, AND MEANS RESPONSIVE TO THE PRESENCE OF A CASING OF PREDETERMINED SIZE WITHIN THE BORE FOR RELEASING THE HANGER FROM THE SUSPENDING MEANS TO PERMIT SAID HANGER TO DROP FREELY INTO THE BOWL FOR SUSPENDING SAID CASING THEREFROM.
Claim 2
Dependent Claim
82 words
WELLHEAD EQUIPMENT, COMPRISING A HOUSING HAVING A BORE THERETHROUGH AND A RECESS ABOUT THE BORE, A BOWL IN THE BORE BENEATH THE RECESS, A CASING HANGER WITHIN THE RECESS, MEANS ON THE HOUSING FOR SUSPENDING THE HANGER AND MOVING IT INWARDLY OF THE BORE, AND MEANS RESPONSIVE TO THE PRESENCE OF A CASING OF PREDETERMINED SIZE WITHIN THE BORE FOR RELEASING THE HANGER FROM THE SUSPENDING MEANS TO PERMIT SAID HANGER TO DROP FREELY INTO THE BOWL FOR SUSPENDING SAID CASING THEREFROM.
References Cited (Backward Citations)
US1988442A
Cited
US2094690A
Cited
US2909359A
Cited
US2891770A
Cited
US3017931A
Cited
US3096999A
Cited
US3137348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |