US3842054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl-type addition polymers containing a plurality of tertiary nitrogens quaternized with an epihalohydrin
Assignee: Hercules LLC
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Filing: 1973-02-26
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Granted: 1974-10-15
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Expires: 1993-02-26
Abstract
Abstract 1. A METHOD WHICH COMPRISES REACTING IN AN AQUEOUS MEDIUM MAINTAINED AT A PH OF FROM ABOUT 7 TO ABOUT 9.5 AND AT A TEMPERATURE OF FROM ABOUT 300* C. TO ABOUT 80* C. (1) AN EPIHALOHYDRIN AND (2) AN ADDITION-TYPE POLYMER OF AN ESTER MONOMER OF THE FORMULA H2C=C(-R)-COO-A-N(-R'')-R" WHEREIN R IS HYDROGEN OR METHYL; R'' IS METHYL OR ETHYL; R" IS METHYL OR ETHYL; AND A IS C2-C6 ALKYLENE HAVING AT LAST 2 CARBON ATOMS BETWEEN THE ADJOINED OXYGEN AND NITROGEN, AT LEAST ABOUT 20% OF THE POLYMER WEIGHT BEING ATTRIBUTABLE TO THE ESTER MONOMER.
Inventors
- 👤 G Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:40
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/38; C; C08; C08F; C08F8/00; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD WHICH COMPRISES REACTING IN AN AQUEOUS MEDIUM MAINTAINED AT A PH OF FROM ABOUT 7 TO ABOUT 9.5 AND AT A TEMPERATURE OF FROM ABOUT 300* C. TO ABOUT 80* C. (1) AN EPIHALOHYDRIN AND (2) AN ADDITION-TYPE POLYMER OF AN ESTER MONOMER OF THE FORMULA
Claim 2
Independent Claim
48 words
A METHOD WHICH COMPRISES REACTING IN AN AQUEOUS MEDIUM MAINTAINED AT A PH OF FROM ABOUT 7 TO ABOUT 9.5 AND AT A TEMPERATURE OF FROM ABOUT 300* C. TO ABOUT 80* C. (1) AN EPIHALOHYDRIN AND (2) AN ADDITION-TYPE POLYMER OF AN ESTER MONOMER OF THE FORMULA
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |