Patent US3326291A successfully refreshed from Google Patents.
US3326291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct-forming devices
Assignee: Individual
•
Filing: 1964-11-12
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Granted: 1967-06-20
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 Zandmer Solis Myron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:44
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN APPARATUS FOR USE IN A BORE HOLE TRAVERSING POROUS STRATA TO BE TAPPED; A DUCT-FORMING DEVICE ADAPTED TO BE SUPPORTED BY A BORE HOLE CASING AND COMPRISING, A BUSHING MOUNTABLE IN THE WALL OF THE CASING, PASSAGE-FORMING MEANS MOVABLE OUTWARDLY IN SAID BUSHING INCLUDING A HOLLOW CYLINDRICAL BODY ADAPTED TO ENGAGE THE WALL OF THE BORE HOLE, SAID HOLLOW CYLINDRICAL BODY BEING IN PART DEFINED BY A REARWARD CLOSURE AND A FORWARD MOVEMENT, AND CONSTRAINING SAID BODY TO AN OUTWARD MOVEMENT, AND MEANS RELEASABLY LOCKING SAID BODY AGAINST OUTWARD MOVEMENT, SAID FORWARD CLOSURE HAVING APERTURES CLOSED BY PLUGS OF A CHOSEN MATERIAL WHICH IS DISSOLVABLE IN A CHOSEN ACID IN WHICH SAID HOLLOW CYLINDRICAL BODY IS NOT DISSOLVABLE WHEREBY SAID CLOSURE, WHEN SAID PLUGS ARE REMOVED, SERVES AS A FILTER THROUGH WHICH OIL MUST FLOW BEFORE ENTERING SAID HOLLOW CYLINDRICAL BODY.
Claim 2
Dependent Claim
142 words
IN APPARATUS FOR USE IN A BORE HOLE TRAVERSING POROUS STRATA TO BE TAPPED; A DUCT-FORMING DEVICE ADAPTED TO BE SUPPORTED BY A BORE HOLE CASING AND COMPRISING, A BUSHING MOUNTABLE IN THE WALL OF THE CASING, PASSAGE-FORMING MEANS MOVABLE OUTWARDLY IN SAID BUSHING INCLUDING A HOLLOW CYLINDRICAL BODY ADAPTED TO ENGAGE THE WALL OF THE BORE HOLE, SAID HOLLOW CYLINDRICAL BODY BEING IN PART DEFINED BY A REARWARD CLOSURE AND A FORWARD MOVEMENT, AND CONSTRAINING SAID BODY TO AN OUTWARD MOVEMENT, AND MEANS RELEASABLY LOCKING SAID BODY AGAINST OUTWARD MOVEMENT, SAID FORWARD CLOSURE HAVING APERTURES CLOSED BY PLUGS OF A CHOSEN MATERIAL WHICH IS DISSOLVABLE IN A CHOSEN ACID IN WHICH SAID HOLLOW CYLINDRICAL BODY IS NOT DISSOLVABLE WHEREBY SAID CLOSURE, WHEN SAID PLUGS ARE REMOVED, SERVES AS A FILTER THROUGH WHICH OIL MUST FLOW BEFORE ENTERING SAID HOLLOW CYLINDRICAL BODY.
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |