Patent US4245674A successfully refreshed from Google Patents.
US4245674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective cover for a thermoresponsive tube
Assignee: Nitto Denko Corp
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Filing: 1979-10-19
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Granted: 1981-01-20
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Expires: 1999-10-19
Abstract
Abstract Thermoshrinkable or thermoexpansive tubes for corrosion prevention or lin of piping are disclosed which have their inner and/or outer walls covered with at least one protective cover to keep them clean from dust, dirt, water or any other foreign matter which might interfere with adhesion to the pipe connection, thus causing corrosion or poor lining.
Inventors
- 👤 Syuichi Nakamura
- 👤 Satoshi Ogawa
- 👤 Yasuhiro Moriyama
- 👤 Tomihisa Ueno
- 👤 Minoru Komura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:32
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/18; F16L58/181; B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0616; B29C63/00; B29C63/0065; B29C63/0069; B29C63/38; B29C63/42; F16L47/00; F16L47/20; F16L47/22; B29C35/00; B29C35/02; B29C35/04; B29C35/045; B29K; B29K2995/00; B29K2995/0037; B29K2995/0049; B29L; B29L2009/00; B29L2009/003; Y; Y10; Y10S; Y10S138/00; Y10S138/01; Y10S138/06; Y10S174/00; Y10S174/08; Y10S206/00; Y10S206/813; Y10S285/00; Y10S285/909; Y10S285/915; Y10S428/00; Y10S428/913; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/28; Y10T428/2839
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
163 words
In a thermoshrinkable tube designed to be wrapped around and to heat-seal pipes to protect the pipes from corrosion, said thermoshrinkable tube having both the inner and outer walls thereof covered with two protective covers to keep them clean of any foreign matter, the improvement wherein said two protective covers have their corresponding ends put together at the opposite ends of the tube and sealed up and being removably fastened to the tube, said protective covers being made of such a material that they can be peeled off the tube before the application of heat by fastening the protective covers to a pipe near the portion of the pipe to be heat-sealed with the thermoshrinkable tube and then moving the thermoshrinkable tube away from the location towards the portion of the pipe to be sealed thereby turning the protective covers inside out, thus making it possible to peel off the protective covers from the thermoshrinkable tube just prior to the heat sealing thereof.
Claim 2
Dependent Claim
163 words
In a thermoshrinkable tube designed to be wrapped around and to heat-seal pipes to protect the pipes from corrosion, said thermoshrinkable tube having both the inner and outer walls thereof covered with two protective covers to keep them clean of any foreign matter, the improvement wherein said two protective covers have their corresponding ends put together at the opposite ends of the tube and sealed up and being removably fastened to the tube, said protective covers being made of such a material that they can be peeled off the tube before the application of heat by fastening the protective covers to a pipe near the portion of the pipe to be heat-sealed with the thermoshrinkable tube and then moving the thermoshrinkable tube away from the location towards the portion of the pipe to be sealed thereby turning the protective covers inside out, thus making it possible to peel off the protective covers from the thermoshrinkable tube just prior to the heat sealing thereof.
Claim 3
Dependent Claim
17 words
A thermoshrinkable tube according to claim 1, which has an adhesive layer on the inner periphery thereof.
Claim 4
Dependent Claim
17 words
A thermoshrinkable tube according to claim 1, wherein the protective covers are made of a waterproof material.
Claim 5
Dependent Claim
23 words
A thermoshrinkable tube according to claim 1, wherein said protective covers are treated to make them more readily peelable from the thermoshrinkable tube.
Claim 6
Dependent Claim
33 words
A thermoshrinkable tube according to claim 4, wherein said protective covers are treated by being coated with silicon resin to make it possible to peel them off more readily from the thermoshrinkable tube.
Claim 7
Dependent Claim
23 words
A thermoshrinkable tube according to claim 1, wherein the protective covers are selected from the group consisting of paper and a plastic sheet.
References Cited (Backward Citations)
US1310185A
Cited
US2664373A
Cited
US3082453A
Cited
US3528825A
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US3610291A
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US3639130A
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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) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |