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US4985487A
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Zwitterion polymers
Assignee: ISP Investments LLC
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Filing: 1990-01-11
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Granted: 1991-01-15
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Expires: 2010-01-11
Abstract
Abstract Zwitterion polymers are provided herein having the formula: ##STR1## where R is OR', where R' is C 1 -C 8 alkyl or a lactam, X is oxygen or nitrogen, n is 2-10, and R 1 and R 2 are each independently C 1 -C 8 alkyl, and mixtures thereof.
Inventors
- 👤 Jenn S. Shih
- 👤 Terry E. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:54
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C08F8/30; C08F8/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
46 words
Zwitterion polymers having the formulas: ##STR3## where R is OR', where R' is C 1 -C 8 alkyl or a lactam, X is oxygen or nitrogen, n is 2-10, and R 1 and R 2 are each independently C 1 -C 8 alkyl, and mixtures thereof.
Claim 2
Dependent Claim
46 words
Zwitterion polymers having the formulas: ##STR3## where R is OR', where R' is C 1 -C 8 alkyl or a lactam, X is oxygen or nitrogen, n is 2-10, and R 1 and R 2 are each independently C 1 -C 8 alkyl, and mixtures thereof.
Claim 3
Dependent Claim
16 words
A zwitterion polymer according to claim 1 wherein R' is a C 1 -C 8 alkyl.
Claim 4
Dependent Claim
12 words
A zwitterion polymer according to claim 1 wherein R' is a lactam.
Claim 5
Dependent Claim
11 words
A zwitterion polymer according to claim 1 wherein X is oxygen.
Claim 6
Dependent Claim
11 words
A zwitterion polymer according to claim 1 wherein X is nitrogen.
Claim 7
Dependent Claim
16 words
A zwitterion polymer according to claim 1 wherein R 1 and R 2 are both methyl.
Claim 8
Dependent Claim
17 words
A zwitterion polymer according to claim 1 which is dissolved in aqueous solution at pH of 7.
References Cited (Backward Citations)
US4308188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |