US3267967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe repair tool
Assignee: MIDLAND NATIONAL BANK
•
Filing: 1963-02-18
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Granted: 1966-08-23
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Guthrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:32
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/1645; F16L55/16455
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A TOOL FOR REPAIRING THE LEAKS IN UNDERGROUND PIPES COMPRISING: A HOLLOW RIGHT CYLINDRICAL SHELL CAPABLE OF BEING EXPANDED AND CONTRACTED IN EXTERIOR DIAMETER, SAID SHELL COMPRISING RIGID CIRCUMFERENTIALLY TELESCOPIC SHELL SECTIONS; FLEXIBLE, COMPRESSIBLE AND STRETCHABLE O-RING SEALS, ONE ENCIRCLING SAID SHELL EXTERIORLY NEAR EACH OF ITS ENDS; GUIDE MEANS CARRIED BY EACH END OF SAID SHELL FOR CENTERING IT IN THE BORE OF A PIPE DURING ITS TRAVEL THERETHROUGH TO A POINT OF LEAKAGE THEREIN; AND REMOTELY CONTROLLED MEANS FOR SELECTIVELY EXPANDING AND CONTRACTING SAID SHELL IN EXTERIOR DIAMETER WHILE IT IS IN THE PIPE.
Claim 2
Dependent Claim
96 words
A TOOL FOR REPAIRING THE LEAKS IN UNDERGROUND PIPES COMPRISING: A HOLLOW RIGHT CYLINDRICAL SHELL CAPABLE OF BEING EXPANDED AND CONTRACTED IN EXTERIOR DIAMETER, SAID SHELL COMPRISING RIGID CIRCUMFERENTIALLY TELESCOPIC SHELL SECTIONS; FLEXIBLE, COMPRESSIBLE AND STRETCHABLE O-RING SEALS, ONE ENCIRCLING SAID SHELL EXTERIORLY NEAR EACH OF ITS ENDS; GUIDE MEANS CARRIED BY EACH END OF SAID SHELL FOR CENTERING IT IN THE BORE OF A PIPE DURING ITS TRAVEL THERETHROUGH TO A POINT OF LEAKAGE THEREIN; AND REMOTELY CONTROLLED MEANS FOR SELECTIVELY EXPANDING AND CONTRACTING SAID SHELL IN EXTERIOR DIAMETER WHILE IT IS IN THE PIPE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |