US4296932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing of leaks in tanks and the like
Assignee: Individual
•
Filing: 1979-09-13
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Granted: 1981-10-27
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Expires: 1999-09-13
Abstract
Abstract A method of sealing leaks is disclosed comprising the use of a bituminous rubber latex emulsion. The emulsion is introduced into the passage through which a fluid is leaking by injecting, often at considerable pressures and a coagulant is used to coagulate the emulsion. Water may be used as a coagulant. Alternatively, the emulsion may be carried into the passages by the water.
Inventors
- 👤 Johannes H. Grobler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:05
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/16; F16L55/162; F16L55/164
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
The method of sealing a fluid passage in a body comprising forming in the body a second passage which intersects the fluid passage and introducing through the second passage to the fluid passage a composition comprising a rubber latex and a bituminous material in sufficient quantity to form an aggregate which effectively seals the fluid passage in the presence of a coagulating agent.
Claim 2
Independent Claim
63 words
The method of sealing a fluid passage in a body comprising forming in the body a second passage which intersects the fluid passage and introducing through the second passage to the fluid passage a composition comprising a rubber latex and a bituminous material in sufficient quantity to form an aggregate which effectively seals the fluid passage in the presence of a coagulating agent.
Claim 3
Dependent Claim
21 words
The method of claim 1 characterised in that the coagulating agent is water which carries the composition to the fluid passage.
Claim 4
Dependent Claim
63 words
The method of claim 6 characterised in that an opening exists in the fluid passage and the second passage is formed to intersect the fluid passage upstream of the opening, whereby the water carries the composition along the fluid passage via the intersection to the opening in the fluid passage, the composition coagulating in or behind the said opening, and thereby sealing it.
Claim 5
Dependent Claim
26 words
The method of claim 1 characterized in that the composition is introduced into the fluid passage under a pressure of at least 15 kg/cm 2 .
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |