US4357960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plumbing method and composition for use in same
Assignee: Individual
•
Filing: 1977-03-24
•
Granted: 1982-11-09
•
Expires: 1997-03-24
Abstract
Abstract Repair of leaks in water pipes or installation of T's in water pipes by use of sleeves applied to open ends of cut pipe, preceded by insertion into open ends of plug material which shuts off flow of water, drying ends of pipe, installation of sleeve and flushing out plug or plugs after installation is complete; also preparation for same.
Inventors
- 👤 Helen Han
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:54
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/1608
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A method of applying a sleeve-like connection between the spaced open ends of a cut pipe, said method comprising inserting into at least one of the open ends of the pipe a plug of plastic material formed of a mixture of a water soluble alginate and bentonite and of a size and shape to conform to the interior size and shape of the pipe to form a watertight seal, such plug having the property of sealing the pipe but of disintegrating readily upon flow of water in the pipe, then applying such a sleeve-like connection between the ends of the pipe by fitting it over the end portions of the pipe, sealing the resulting joints and thereafter causing flow of water in the pipe to disintegrate the plug or plugs and flush the same out of the pipe.
Claim 2
Independent Claim
138 words
A method of applying a sleeve-like connection between the spaced open ends of a cut pipe, said method comprising inserting into at least one of the open ends of the pipe a plug of plastic material formed of a mixture of a water soluble alginate and bentonite and of a size and shape to conform to the interior size and shape of the pipe to form a watertight seal, such plug having the property of sealing the pipe but of disintegrating readily upon flow of water in the pipe, then applying such a sleeve-like connection between the ends of the pipe by fitting it over the end portions of the pipe, sealing the resulting joints and thereafter causing flow of water in the pipe to disintegrate the plug or plugs and flush the same out of the pipe.
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein the proportion of bentonite and alginate are approximately 60 parts of bentonite and 40 parts of alginate by volume.
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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) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |