Patent US3072196A successfully refreshed from Google Patents.
US3072196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing centralizer
Assignee: Weatherford Oil Tool Co Inc
•
Filing: 1960-11-28
•
Granted: 1963-01-08
•
Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Addison N Love
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:31
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B17/1028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A CENTRALIZER COMPRISING A PAIR OF SPACED COLLARS ADAPTED TO BE LOCATED ALONG A MEMBER TO BE CENTRALIZED, AT LEAST ONE OF SAID COLLARS HAVING AN APERTURE, AND OUTWARDLY BOWED, RESILIENT ELEMENTS EXTENDING BETWEEN SAID COLLARS, AT LEAST ONE OF SAID ELEMENTS BEING A RESILIENTLY FLEXIBLE WIRE AND HAVING AN ANGULARLY OFFSET END EXTENDING THROUGH SAID APERTURE AND TORSIONALLY DISTORTED SO AS TO BE RESILIENTLY LODGED AGAINST THE INNER FACE OF SAID LATTER COLLAR ADJACENT SAID APERTURE TO ANCHOR SAID LATTER ELEMENT IN POSITION.
Claim 2
Dependent Claim
84 words
A CENTRALIZER COMPRISING A PAIR OF SPACED COLLARS ADAPTED TO BE LOCATED ALONG A MEMBER TO BE CENTRALIZED, AT LEAST ONE OF SAID COLLARS HAVING AN APERTURE, AND OUTWARDLY BOWED, RESILIENT ELEMENTS EXTENDING BETWEEN SAID COLLARS, AT LEAST ONE OF SAID ELEMENTS BEING A RESILIENTLY FLEXIBLE WIRE AND HAVING AN ANGULARLY OFFSET END EXTENDING THROUGH SAID APERTURE AND TORSIONALLY DISTORTED SO AS TO BE RESILIENTLY LODGED AGAINST THE INNER FACE OF SAID LATTER COLLAR ADJACENT SAID APERTURE TO ANCHOR SAID LATTER ELEMENT IN POSITION.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |