Sealing of surface sulfonated plastic shaped articles
Abstract
Abstract SURFACE SULFONATED SHAPED ARTICLES OF THERMOPLASTIC ORGANIC POLYMERS ARE SEALED AT TEMPERATURES BELOW THE HEAT DISTORTION TEMPERATURE OF THE POLYMER BY (1) TREATING AT LEAST A PORTION OF THE ARTICLE SURFACE WITH A LIQUID WHICH IS A NON-SOLVENT FOR THE BASE POLYMER AND A SOLVENT FOR THE SULFONATED POLYMER ON THE SURFACE, E.G., WATER, (2) POSITIONING THE TREATED SURFACE AGAINST ANOTHER SURFACE OF SURFACE SULFONATED SHAPE ARTICLE SUCH THAT THE LIQUID IS DISPOSED THEREBETWEEN AND (3) REMOVING THE LIQUID AT TEMPEREATURES BELOW THE HEAT DISTORTION POINT OF THE POLYMER. THE ABOVE SEALING METHOD IS REVERSIBLE IN THAT SOAKING THE SEALED PORTION OF SHAPED ARTICLE IN A SUITABLE SEALING LIQUID RELEASES THE SEAL WITHOUT DAMAGING THE ARTICLE.
Inventors
- 👤 Robert J Caiola
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |