US4576871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-recoverable article
Assignee: Siemens AG
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Filing: 1984-01-27
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Granted: 1986-03-18
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Expires: 2004-01-27
Abstract
Abstract A heat-recoverable article which includes an outer layer of an opaque, dimensionally stable, thermoplastically deformable material and an inner layer of a cross-linked heat-recoverable (heat-shrinkable) material having a characteristic recovery shrinkage temperature. The outer layer has the property of becoming transparent at a decrystallization temperature which is at least as high as the shrinkage temperature, and preferably a few degrees higher, whereby the condition of the inner layer becomes visible through the outer layer when the article is heated to the decrystallization temperature.
Inventors
- 👤 Ulrich Oestreich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91211; B29C66/91218; B29C61/00; B29C61/06; B29C61/0608; B29C61/0616; B29C61/0666; B29C66/91221; H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/5324; B29C66/70; B29C66/71; B29K; B29K2023/00; B29K2995/00; B29K2995/0018; B29K2995/0026; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31931
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
79 words
A heat-recoverable article comprising: an outer layer of an opaque, dimensionally stable, thermoplastically deformable material and a colored inner layer of a cross-linked heat-recoverable material having a characteristic recovery shrinkage temperature, said outer layer having the property of being non-transparent below the shrinkage temperature and of becoming transparent at a decrystallization temperature at least as high as said shrinkage temperature whereby said inner layer becomes visible through said outer layer when the article is heated to said decrystallization temperature.
Claim 2
Dependent Claim
79 words
A heat-recoverable article comprising: an outer layer of an opaque, dimensionally stable, thermoplastically deformable material and a colored inner layer of a cross-linked heat-recoverable material having a characteristic recovery shrinkage temperature, said outer layer having the property of being non-transparent below the shrinkage temperature and of becoming transparent at a decrystallization temperature at least as high as said shrinkage temperature whereby said inner layer becomes visible through said outer layer when the article is heated to said decrystallization temperature.
Claim 3
Dependent Claim
17 words
A heat-recoverable article as claimed in claim 1 wherein said outer layer consists of high density polyethylene.
Claim 4
Dependent Claim
15 words
A heat-recoverable article as claimed in claim 1 wherein said outer layer consists of polypropylene.
Claim 5
Dependent Claim
20 words
A heat-recoverable article as claimed in claim 1 wherein said outer layer consists of a mixture of polyethylene and polypropylene.
Claim 6
Dependent Claim
17 words
A heat-recoverable article as claimed in claim 1 wherein said inner layer consists of low density polyethylene.
Claim 7
Dependent Claim
17 words
A heat-recoverable article as claimed in claim 1 wherein said inner layer consists of a synthetic rubber.
Claim 8
Dependent Claim
17 words
A heat-recoverable article as claimed in claim 1 in which said outer layer contains an ultaviolet stabilizer.
Claim 9
Dependent Claim
16 words
A heat-recoverable article as claimed in claim 1 wherein said inner layer has a dark color.
Claim 10
Dependent Claim
20 words
A heat-recoverable article as claimed in claim 1 wherein said decrystallization temperature is within 20° C. of said shrinkage temperature.
References Cited (Backward Citations)
US4035534A
Cited
US4323607A
Cited
US4465717A
Cited
US4390587A
Cited
US4467002A
Cited
US4472468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |