US3784649A
Expired / Lapsed
US
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High molecular weight ionene polymeric compositions
Assignee: Buckman Laboratories International Inc
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Filing: 1971-03-30
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Granted: 1974-01-08
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Expires: 1991-03-30
Abstract
Abstract HIGH MOLECULAR WEIGHT IONENE POLYMERIC COMPOSITIONS ARE PREPARED BY REACTING A DIHALO ORGANIC COMPOUND WITH A SECONDARY OR A DITERTIARY AMINE AND THEN REACTING THE RESULTANT PRODUCT WITH A POLYMERIC BACKBONE COMPOSITION AND A COUPLING AGENT. THE RESULTING POLYMERS HAVE UTILITY IN MANY DIVERSE APPLICATIONS.
Inventors
- 👤 S Buckman
- 👤 J Pera
- 👤 F Raths
- 👤 G Mercer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:12
CPC Classifications
C; C08; C08G; C08G81/00; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/42; D21H17/43; D21H17/44; D21H17/45
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |