US4543292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer structure
Assignee: General Electric Co
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Filing: 1984-12-12
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Granted: 1985-09-24
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Expires: 2004-12-12
Abstract
Abstract A multilayer structure comprising an outer layer of aromatic polycarbonate and an outer layer of a polyolefin, said outer layers tied together with a layer comprising an admixture of a polyolefin and a polyalkylene terephthalate, the polyalkylene terephthalate present in said quantities in the tie layer so as to provide adhesion between the outer layers.
Inventors
- 👤 Harold F. Giles, Jr.
- 👤 Lorene E. Baccaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:30
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/36; B32B27/365; B32B7/00; B32B7/04; B32B7/12; B32B2272/00; B32B2309/00; B32B2309/02; B32B2369/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
54 words
A multilayer structure comprising an outer layer of aromatic polycarbonate and an outer layer of a polyolefin, said outer layers tied together with a layer comprising an admixture of a polyolefin and a polyalkylene terephthalate, the polyalkylene terephthalate present in quantities in the tie layer so as to provide adhesion between the outer layers.
Claim 2
Dependent Claim
54 words
A multilayer structure comprising an outer layer of aromatic polycarbonate and an outer layer of a polyolefin, said outer layers tied together with a layer comprising an admixture of a polyolefin and a polyalkylene terephthalate, the polyalkylene terephthalate present in quantities in the tie layer so as to provide adhesion between the outer layers.
Claim 3
Dependent Claim
13 words
The structure in accordance with claim 1 wherein the polycarbonate is bisphenol-A polycarbonate.
Claim 4
Dependent Claim
16 words
The structure in accordance with claim 1 wherein the polyolefin in the outer layer is polypropylene.
Claim 5
Dependent Claim
16 words
The structure in accordance with claim 1 wherein the polyolefin in the tie layer is polypropylene.
Claim 6
Dependent Claim
14 words
The structure in accordance with claim 1 wherein the polyalkylene terephthalate is polybutylene terephthalate.
Claim 7
Dependent Claim
19 words
The structure in accordance with claim 5 wherein polypropylene is the polyolefin in both the outer and tie layers.
Claim 8
Dependent Claim
13 words
The structure in accordance with claim 6 wherein the polycarbonate is bisphenol-A polycarbonate.
Claim 9
Dependent Claim
30 words
The structure in accordance with claim 5 wherein the polybutylene terephthalate is from about 30% to about 70% weight percent of the polybutylene terephthalate and polypropylene in the tie layer.
Claim 10
Dependent Claim
30 words
The structure in accordance with claim 7 wherein the polybutylene terephthalate is from about 45% to about 55% weight percent of the polybutylene terephthalate and polypropylene in the tie layer.
References Cited (Backward Citations)
US4339502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |