US4962164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradable polymers and articles made therefrom
Assignee: Graham Packaging Plastic Products Inc
•
Filing: 1988-06-27
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Granted: 1990-10-09
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Expires: 2008-06-27
Abstract
Abstract Degradable compositions of polyesters, polyamides, polystyrenes and polyvinyl chlorides containing effective degradable amounts of CO in the composition.
Inventors
- 👤 Saleh A. Jabarin
- 👤 Dennis C. Balduff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:48
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L101/00; C08L2201/00; C08L2201/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A degradable composition consisting essentially of (A) a copolymer of ethylene and carbon monoxide used in an amount sufficient to provide about 0.001% to 0.05% wt. % of CO in the composition to reduce the percent elongation in six months to about 100% or lower, and (B) a polyester comprising substantially the balance of the composition.
Claim 2
Dependent Claim
56 words
A degradable composition consisting essentially of (A) a copolymer of ethylene and carbon monoxide used in an amount sufficient to provide about 0.001% to 0.05% wt. % of CO in the composition to reduce the percent elongation in six months to about 100% or lower, and (B) a polyester comprising substantially the balance of the composition.
Claim 3
Dependent Claim
23 words
A degradable composition as defined in claim 1 in which the polyester is a copolyester of terephthalic or isophthalic acid and ethylene glycol.
Claim 4
Dependent Claim
15 words
A degradable composition as defined in claim 1 in which the polyester is polyethylene terephthalate.
Claim 5
Dependent Claim
26 words
A degradable composition as defined in claim 1 in which the polyester is a copolyester of isophthalic or terephthalic acid and ethylene glycol and a sulfone.
Claim 6
Dependent Claim
24 words
A composition as defined in claim 1 in which the total amount of CO in the composition is about 0.01% to 0.02% wt. %.
Claim 7
Dependent Claim
10 words
An article comprising a composition as defined in claim 3.
Claim 8
Dependent Claim
10 words
A polyester article made with the composition of claim 1.
Claim 9
Dependent Claim
12 words
A polyester container made of the composition as defined in claim 1.
References Cited (Backward Citations)
US4137382A
Cited
US4739012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-08 | 1994-04-09 | 1994-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-08 | 1998-04-09 | 1998-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-08 | 2002-04-09 | 2002-10-09 | $7700.00 | Window Closed / Lapsed |