Patent US3776983A successfully refreshed from Google Patents.
US3776983A
Expired / Lapsed
US
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Block polymers derived from vinyl quaternary nitrogen monomers and polyalkylene oxide condensates
Assignee: Indopco Inc
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Filing: 1971-06-10
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Granted: 1973-12-04
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Expires: 1991-06-10
Abstract
Abstract NOVEL BLOCK COPOLYMERS OF THE A-B OR A-B-A TYPE ARE DESCRIBED WHEREIN THE A BLOCK IS DERIVED FROM A VINYL QUATERNARY NITROGEN MONOMER AND THE B BLOCK IS DERIVED FROM A POLYALKYLENE OXIDE CONDENSATE. THE NOVEL COPOLYMERS ARE WATER-SOLUBLE OR WATER-DISPERSIBLE AND ARE USEFUL AS ELECTROCONDUCTIVE COATINGS IN THE MANUFACTURE OF ELECTROPHOTOCONDUCTIVE PAPER.
Inventors
- 👤 C Iovine
- 👤 Chaudhuri D Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:39
CPC Classifications
C; C08; C08F; C08F293/00
Claims Analysis
Total Claims: 0
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References 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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |