US4067759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for sealing and repairing leaks in ruptured containers
Assignee: Environmental Protection Agency
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Filing: 1976-12-21
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Granted: 1978-01-10
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Expires: 1996-12-21
Abstract
Abstract A system for sealing and repairing leaks in ruptured containers whereby an applicator including an open-celled sponge body is inserted into the rupture and the two interacting components of a binary fluid foam composition are mixed and injected into the sponge body, thereby expanding and forming a foam composite with the latter against the rupture to effectively seal and repair same upon curing of the foam in situ.
Inventors
- 👤 John J. Vrolyk
- 👤 Robert W. Melvold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:57
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/18; B29C44/182; B29C44/184; B29C73/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/20; Y10T428/249921; Y10T428/249953; Y10T428/249987
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A method of sealing and repairing a rupture in the wall of a container for storing material comprising the steps of: a. inserting an open-celled sponge body into the rupture so that the sponge body extends from either side of the container wall, b. injecting a curable plastic foam composition into the sponge body to expand the sponge body against the periphery of the rupture, and c. curing the foam in situ to form a foam composite with the sponge body for sealing the rupture.
Claim 2
Independent Claim
85 words
A method of sealing and repairing a rupture in the wall of a container for storing material comprising the steps of: a. inserting an open-celled sponge body into the rupture so that the sponge body extends from either side of the container wall, b. injecting a curable plastic foam composition into the sponge body to expand the sponge body against the periphery of the rupture, and c. curing the foam in situ to form a foam composite with the sponge body for sealing the rupture.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the plastic foam composition is polyurethane foam.
Claim 4
Dependent Claim
30 words
The method of claim 1 wherein the sponge body includes an expandible outer covering layer for preventing contact between the plastic foam composition and the material stored within the container.
Claim 5
Dependent Claim
17 words
The method of claim 3 wherein the expandible outer covering layer is a coating of silicone rubber.
Claim 6
Dependent Claim
15 words
The method of claim 3 wherein the expandible outer covering layer is a rubber sleeve.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |