US3124196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical bow centralizer
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:57
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1014; E21B17/1021; E21B17/1028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A TOOL FOR USE ON THE EXTERIOR OF A WELL CASING IN A WELL BORE, THE COMBINATION OF: A PAIR OF AXIALLY SPACED AND ALIGNED COLLARS ADAPTED TO ENCIRCLE THE WELL CASING, A PLURALITY OF BOWS EACH HAVING TWO ENDS AND AN OUTWARDLY BOWED MID-PORTION, EACH BOW HAVING ONE END MOUNTED ON ONE OF SAID COLLARS AND THE OTHER END MOUNTED ON THE OTHER OF SAID COLLARS, THE SAID ENDS OF EACH BOW BEING CIRCUMFERENTIALLY OFFSET FROM EACH OTHER, AND AT LEAST THE MID-PORTION OF EACH BOW HAVING A GENERALLY ARCUATE LATERAL CROSS-SECTION FORMING A CONVEX OUTER SURFACE.
Claim 2
Dependent Claim
99 words
IN A TOOL FOR USE ON THE EXTERIOR OF A WELL CASING IN A WELL BORE, THE COMBINATION OF: A PAIR OF AXIALLY SPACED AND ALIGNED COLLARS ADAPTED TO ENCIRCLE THE WELL CASING, A PLURALITY OF BOWS EACH HAVING TWO ENDS AND AN OUTWARDLY BOWED MID-PORTION, EACH BOW HAVING ONE END MOUNTED ON ONE OF SAID COLLARS AND THE OTHER END MOUNTED ON THE OTHER OF SAID COLLARS, THE SAID ENDS OF EACH BOW BEING CIRCUMFERENTIALLY OFFSET FROM EACH OTHER, AND AT LEAST THE MID-PORTION OF EACH BOW HAVING A GENERALLY ARCUATE LATERAL CROSS-SECTION FORMING A CONVEX OUTER SURFACE.
References Cited (Backward Citations)
US1820391A
Cited
US2009496A
Cited
US2220237A
Cited
US2388416A
Cited
US2515149A
Cited
US2903073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |