US3728319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of poly n-vinylpyrrolidone or poly n-vinylpyrrolidones with alkyl side chains and organic secondary or tertiary amines
Assignee: GAF Chemicals Corp
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Filing: 1970-02-19
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Granted: 1973-04-17
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Expires: 1990-02-19
Abstract
Abstract AMINO-ALKYLATED HETEROCYCLIC N-VINYL POLYMERS ARE DISCLOSED. THE POLYMERS ARE THE REACTION PRODUCT OF POLYVINYL PYRROLIDONE, ALKYLATED POLYVINYL PYRROLIDONE, OR N-VINYLPYRROLIDONE WITH A SATURATED SECONDARY OR TETIARY AMINE. THE PRODUCT CAN BE PREPARED BY REACTING THE POLYVINYLPYRROLIDONE OR ALKYLATED POLYVINYL PYRROLIDONE WITH AMINE IN THE PRESENCEOF A SUITABLE SOLVENT AND A FREE RADICAN INITIATOR. ALTERNATIVELY, MONOMERIC N-VINYLPYRROLIDONE CAN BE SIMULTANEOUSLY POLYMERIZED AND AMINO-ALKYLATED.
Inventors
- 👤 R Kiesel
- 👤 D Randall
- 👤 N Field
- 👤 S Rudoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:10
CPC Classifications
C; C08; C08F; C08F26/00; C08F26/06; C08F8/00
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |