Patent US3606913A successfully refreshed from Google Patents.
US3606913A
Expired / Lapsed
US
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Apparatus for internally sealing pipes
Assignee: Gas Technology Institute
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Filing: 1968-12-13
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Granted: 1971-09-21
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Expires: 1988-12-13
Abstract
Abstract A NOVEL APPARATUS AND METHOD FOR INTERNALLY SEALING LEAKING JOINTS IN PIPELINES WHICH CONTEMPLATES THE USE OF A COLLAPSIBLE APPARATUS WHICH CAN BE INSERTED INTO, AND TRAVEL WITHIN, THE PIPELINE. THE APPARATUS INCLUDES AN ELECTRICAL GAS-LOCATING MEANS, LOCKING MEANS FOR LOCKING THE APPERATUS OVER A GAP, AND A SEALING MATERIAL-APPLYING MEANS FOR DIRECTLY APPLYING THE SEALING MATERIAL TO THE LOCATED GAP WHILE THE APPARATUS IS IN LOCKED POSITION OVER THE GAP.
Inventors
- 👤 Gene G Yie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:51
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/1645
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |