US3706677A
Expired / Lapsed
US
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Polyxylylidene articles
Assignee: Dow Chemical Co
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Filing: 1970-10-05
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Granted: 1972-12-19
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Expires: 1990-10-05
Abstract
Abstract THE COMPOSITIONS ARE OF THE CLASS OF POLYXYLYLIDENE HAVING A HIGH DEGREE OF POLYMERIZATION IN THE FORM OF COATINGS, FILMS, FIBERS OR FOAMS. SUCH ARTICLES ARE PREPARED FROM POLYELECTROLYTES COMPRISING VISCOUS AQUEOUS SOLUTIONS OF P-PHENYLENE DIMETHYLENE BIS(DIALKYL SULFONIUM SALTS), OR THE ANALOGOUS HYDROXIDE, BY SHAPING SUCH VISCOUS AQUEOUS SOLUTIONS, FOR EXAMPLE BY CASTING A WET FILM OR EXTRUDING THE SOLUTION INTO A BASIC AQUEOUS BATH, THEN DRYING, SOMETIMES WITH HEATING, TO CONVERT THE SOLFONIUM POLYELECTROLYTE TO A POLYXYLYLIDENE IN THE FORM OF A FILM, COATING, FIBER OR FOAM.
Inventors
- 👤 Ritchie A Wessling
- 👤 Ray G Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:59
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26; C08G; C08G61/00; C08G61/02; C08J9/02; C08J2365/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T428/29; Y10T428/2913; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31678; Y10T428/31692; Y10T428/31971; Y10T428/31989; Y10T428/31993
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |