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Patent US4443019A successfully refreshed from Google Patents.
US4443019A
Expired / Lapsed
US
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Aqueously-swelling water stopper and a process of stopping water thereby
Assignee: Hayakawa Rubber Co Ltd
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Filing: 1982-04-19
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Granted: 1984-04-17
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Expires: 2002-04-19
Abstract
Abstract The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer. The aforesaid water-stopping composition may be extruded into an elongated water stopper with or without a core therein, which water stopper can be inserted into a joint gap or other gap of structural members to stop water at the gap.
Inventors
- 👤 Yoshinobu Ishido
- 👤 Hideo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:29
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; E; E04; E04B; E04B1/00; E04B1/62; E04B1/66; E04B1/68; E04B1/6801; E04B1/6813; C09K2003/1034; C09K2003/104; C09K2200/00; C09K2200/02; C09K2200/0243; C09K2200/0252; C09K2200/0256; C09K2200/06; C09K2200/0607; C09K2200/061; C09K2200/0615; C09K2200/0617; C09K2200/0642; Y; Y10; Y10S; Y10S277/00; Y10S277/934; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A water stopper comprising an elongated core member having a high tensile strength, and at least one layer of an aqueously-swelling water-stopping composition secured to the outer surface of said elongated core member; wherein said aqueously-swelling water-stopping composition consists of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber blended with less than 30 weight % of virgin rubber, 10 to 20 weight % of a silicic compound selected from the group consisting of silicic acid anhydride, hydrous silicic acid and calcium silicate, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer.
Claim 2
Dependent Claim
37 words
A water stopper as set forth in claim 1, wherein said elongated core member is made of a material selected from the group consisting of hard rubber, hard plastics, foam rubber, foamed plastics, and a combination thereof.
Claim 3
Dependent Claim
16 words
A water stopper as set forth in claim 1, wherein said elongated core member is solid.
Claim 4
Dependent Claim
16 words
A water stopper as set forth in claim 1, wherein said elongated core member is hollow.
Claim 5
Dependent Claim
22 words
A water stopper as set forth in claim 1, wherein said elongated core member is enclosed by said aqueously-swelling water-stopping composition layer.
Claim 6
Dependent Claim
47 words
A water stopper as set forth in claim 1, wherein said elongated core member is enclosed by at least two covering layers including an outer layer made of said aqueously-swelling water-stopping composition, at least a part of an outermost layer thereof being made of water-passing resilient substance.
Claim 7
Dependent Claim
17 words
A water stopper as set forth in claim 6, wherein said water-passing resilient substance is sponge rubber.
Claim 8
Dependent Claim
117 words
A water stopper comprising an elongated core member having a high tensile strength; and at least one layer of an aqueously-swelling water-stopping composition secured to the outer surface of said elongated core member; at least one adhesive layer secured to the outside surface of said layer of aqueously-swelling water-stopping composition; said aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber blended with less than 30 weight % of virgin rubber, 10 to 20 weight % of silicic compound selected from the group consisting of silicic acid anhydride, hydrous silicic acid and calcium silicate, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer.
Claim 9
Dependent Claim
23 words
A water stopper as set forth in claim 8, wherein a parting paper is provided on the outer surface of said adhesive layer.
Claim 10
Dependent Claim
146 words
A water stopper comprising an elongated core member having a high tensile strength; and at least one layer of an aqueously-swelling water-stopping composition secured to the outer surface of said elongated core member; said aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber blended with less than 30 weight % of virgin rubber, 10 to 20 weight % of silicic compound selected from the group consisting of silicic acid anhydride, hydrous silicic acid and calcium silicate, 10 to 60 weight % of bentonite, and 10 to 40 weight % of plasticizer and said elongated core member has a hollow rectangular cross section and two layers of said aqueously-swelling water-stopping composition are secured to opposite outer surfaces of said elongated core member and at least one adhesive layer is provided on the outside surface of said composition layer.
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) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |