Patent US4535025A successfully refreshed from Google Patents.
US4535025A
Expired / Lapsed
US
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Oriented, high density poly(ethylene terephthalate)
Assignee: Graham Packaging Plastic Products Inc
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Filing: 1984-07-06
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Granted: 1985-08-13
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Expires: 2004-07-06
Abstract
Abstract Disclosed is a new ductile poly(ethylene terephthalate) material which is clear, biaxially oriented and has a density of over 1.4050 grams/cc. at 25° C.
Inventors
- 👤 Saleh A. Jabarin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:36
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08J2367/00; C08J2367/02; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
75 words
Biaxially oriented and heat set poly(ethylene terephthalate) material which has two substantially parallel faces each of an area which is extended as compared to the area of any planar cross-section cutting said two faces, the ratio of the said extended area to said cross-sectional area being at least 10, said poly(ethylene terephthalate) being clear, ductile and having a density at 25° C. of over 1.4050 and a percent haze of no more than 10 percent.
Claim 2
Dependent Claim
75 words
Biaxially oriented and heat set poly(ethylene terephthalate) material which has two substantially parallel faces each of an area which is extended as compared to the area of any planar cross-section cutting said two faces, the ratio of the said extended area to said cross-sectional area being at least 10, said poly(ethylene terephthalate) being clear, ductile and having a density at 25° C. of over 1.4050 and a percent haze of no more than 10 percent.
Claim 3
Dependent Claim
17 words
Poly(ethylene terephthalate) material of claim 1 wherein said two faces are separated by less than 50 mils.
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) | 1988-08-12 | 1989-02-11 | 1989-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-12 | 1993-02-11 | 1993-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-12 | 1997-02-11 | 1997-08-13 | $7700.00 | Window Closed / Lapsed |