US5135682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable solutions of polyaniline and shaped articles therefrom
Assignee: EIDP Inc
•
Filing: 1990-03-15
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Granted: 1992-08-04
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Expires: 2010-03-15
Abstract
Abstract Polyaniline fibers are spun from stable solutions of the polymer in certain amine solvents.
Inventors
- 👤 Jeffrey D. Cohen
- 👤 Raymond F. Tietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
C; C08; C08G; C08G73/00; D; D01; D01F; D01F6/00; D01F6/58; D01F6/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A stable spinning solution consisting essentially of from about 10 to 30% by weight of polyaniline in a solvent selected from the group consisting of 1,4-diaminocyclohexane, 1,5-diazabicyclo[4.3.0 non-5-ene, and a mixture of N-methylpyrrolidone with either pyrrolidine or ammonia in an amount sufficient to dissolve the polyaniline
Claim 2
Dependent Claim
46 words
A stable spinning solution consisting essentially of from about 10 to 30% by weight of polyaniline in a solvent selected from the group consisting of 1,4-diaminocyclohexane, 1,5-diazabicyclo[4.3.0 non-5-ene, and a mixture of N-methylpyrrolidone with either pyrrolidine or ammonia in an amount sufficient to dissolve the polyaniline
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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |