Patent US4221303A successfully refreshed from Google Patents.
US4221303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anticorrosive liquid tank with offset lining joints
Assignee: Sekisui Chemical Co Ltd
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Filing: 1978-03-03
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Granted: 1980-09-09
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Expires: 1998-03-03
Abstract
Abstract A steel or concrete liquid tank body 1 has an adhesively secured internal cushioning layer of rubber sheets 2 underlying an adhesively secured lining of corrosion resistant synthetic resin sheets 4. The angular tank body corners are provided with triangular rubber strips 3 to contour the lining sheets and avoid stress concentrations. The overlapping glued and welded joints a between adjacent resin sheets 4 are staggered or offset with respect to the mitered joints b between adjacent rubber sheets, and the corners of the interior of the joints a are spaced from the tank.
Inventors
- 👤 Yukio Yoshimura
- 👤 Masahisa Sonku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:20
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/02; B65D90/04; B65D90/041; B65D90/044; B65D90/045; Y; Y10; Y10S; Y10S220/00; Y10S220/917
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
In an anticorrosive tank for caustic liquids or the like including a tank body, a cushioning layer comprising adjoining sheets of shock absorptive material adhesively secured to the internal surface of the tank body, and a lining layer comprising adjoining sheets of corrosion resistant synthetic resin material overlying and adhesively secured to the shock absorptive sheets, said corrosion resistant synthetic material forming a liquid-containing interior tank surface the improvements characterized by: (a) the joints between adjacent resin sheets being offset from the joints between adjacent shock absorptive sheets, and (b) the resin sheet joints being spaced from the corners of the liquid-contacting interior surface of the tank, and (c) the adjoining resin sheets are generally rectangular and have long and short sides, and the horizontal joint lines between the short sides of adjoining resin sheets are staggered with respect to the horizontal joint lines between the short sides of resin sheets adjacent each other along the long sides.
Claim 2
Dependent Claim
158 words
In an anticorrosive tank for caustic liquids or the like including a tank body, a cushioning layer comprising adjoining sheets of shock absorptive material adhesively secured to the internal surface of the tank body, and a lining layer comprising adjoining sheets of corrosion resistant synthetic resin material overlying and adhesively secured to the shock absorptive sheets, said corrosion resistant synthetic material forming a liquid-containing interior tank surface the improvements characterized by: (a) the joints between adjacent resin sheets being offset from the joints between adjacent shock absorptive sheets, and (b) the resin sheet joints being spaced from the corners of the liquid-contacting interior surface of the tank, and (c) the adjoining resin sheets are generally rectangular and have long and short sides, and the horizontal joint lines between the short sides of adjoining resin sheets are staggered with respect to the horizontal joint lines between the short sides of resin sheets adjacent each other along the long sides.
Claim 3
Dependent Claim
33 words
An anticorrosive tank as defined in claim 1, wherein the tank body is generally rectangular, and further comprising generally triangular contour strips of elastic material fitted in the corners of the tank body.
Claim 4
Dependent Claim
19 words
An anticorrosive tank as defined in claims 1 or 2, wherein the shock absorptive sheets are made of rubber.
Claim 5
Dependent Claim
31 words
An anticorrosive tank as defined in claims 1 or 2, wherein the corrosion resistant synthetic resin sheets are made of semirigid vinyl chloride resin containing 10% to 50% of a plasticizer.
Claim 6
Dependent Claim
28 words
An anticorrosive tank as defined in claims 1 or 2, wherein the shock absorptive sheet joints are mitered, and the resin sheet joints are adhesively overlapped and welded.
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |