Patent US3663509A successfully refreshed from Google Patents.
US3663509A
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Sulphonated polyethers
Assignee: RHODJACETA SOC
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Filing: 1968-10-28
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Granted: 1972-05-16
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Expires: 1988-10-28
Abstract
Abstract THE PRESENT INVENTION RELATES TO NEW SULPHONATED POLYETHERS USED AS AGENTS FOR MODIFYING POLYAMIDES AND POLYGEOUSLY BY INCORPORATED IN POLYESTERS OR POLYAMIDES AS A DISPERSION OR, IN THE CAST OF POLYESTERS, AS PART OF THE POLYMER MOLECULE, TO IMPROVE THEIR AFFINTIY FOR BASIC DYESTUFFS.
Inventors
- 👤 Lucien Bonnard
- 👤 Rene Pich
- 👤 Alain Palsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:31
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G63/00; C08G63/66; C08G63/668; C08G63/672; C08G75/00; C08G75/20; C08G75/23; C08L; C08L71/00; C08L2205/00; C08L2205/05; C08L77/00; C08L77/04; C08L77/06
Claims Analysis
Total Claims: 0
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |