US4642331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of enhancing the flexibility of polypyrrole structures
Assignee: Noveon IP Holdings Corp
•
Filing: 1985-05-20
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Granted: 1987-02-10
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Expires: 2005-05-20
Abstract
Abstract A method for making polypyrrole structures less brittle comprising the steps of contacting the polypyrrole with an antioxidant until a desired degree of non brittleness is achieved. The antioxidants are preferably aromatic antioxidants. Polypyrroles of reduced brittleness include the antioxidants in low percentage.
Inventors
- 👤 Ian M. Hodge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:19
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; C08G61/124
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A method for enhancing the flexibility of structures formed of a polypyrrole comprising the steps of: forming the polypyrrole structure; contacting the structure with an amine antioxidant for a period of time sufficient to render the structure less brittle; and desisting contact with the antioxidant.
Claim 2
Independent Claim
45 words
A method for enhancing the flexibility of structures formed of a polypyrrole comprising the steps of: forming the polypyrrole structure; contacting the structure with an amine antioxidant for a period of time sufficient to render the structure less brittle; and desisting contact with the antioxidant.
Claim 3
Dependent Claim
15 words
The method of claim 1, the structure being contacted with a solution of the antioxidant.
Claim 4
Independent Claim
51 words
A method for enhancing the flexibility of a film formed of a polypyrrole comprising the steps of: forming the film employing an electrolytic polymerization technique; contacting the formed film with an amine antioxidant for a period of time sufficient to render the film less brittle; and desisting contact with the antioxidant.
Claim 5
Independent Claim
51 words
A method for enhancing the flexibility of a film formed of a polypyrrole comprising the steps of: forming the film employing an electrolytic polymerization technique; contacting the formed film with an amine antioxidant for a period of time sufficient to render the film less brittle; and desisting contact with the antioxidant.
Claim 6
Dependent Claim
16 words
The method of claim 3, the formed film being contacted with a solution of the antioxidant.
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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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |