US3711574A
Expired / Lapsed
US
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Copolymers of acrylamide gas
Assignee: Roche Diagnostics GmbH
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Filing: 1970-02-06
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Granted: 1973-01-16
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Expires: 1990-02-06
Abstract
Abstract Water insoluble biologically active proteins are bound on novel copolymers consisting of (a) acrylamide (b) ethylene-maleic acid or its anhydride and/or (c) maleic acid and/or its anhydride and (d) N,N''-methylene-bis-acrylamide or ethylene diacrylate in a weight ratio a:b:c:d of 3 : 0.5 - 1.5 : 0.05 - 4 : 0.075 - 0.9, the weight ratio a : (b + c) being not more than 4, to provide compositions which are outstanding in their ability to yield up the bound protein, and with which precise substrate reactions can be carried out.
Inventors
- 👤 D Jaworek
- 👤 W Gruber
- 👤 H Bergmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:57
CPC Classifications
A; A61; A61K; A61K39/00; A61K39/395; A61K39/44; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C08F22/00; C08F8/00; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/082; C12N11/087; Y; Y10; Y10S; Y10S530/00; Y10S530/81; Y10S530/812; Y10S530/815; Y10S530/816
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
45 words
A polymer as claimed in claim 1 consisting of (1) acrylamide, (2) a copolymer of ethylene-maleic acid or its anhydride, and (3) N,N''-methylene-bis-acrylamide or ethylene diacrylate, in a weight ratio (1) : (2) : (3) of 3 : 0.5 - 1.5 : 0.075 - 0.9.
Claim 2
Dependent Claim
42 words
A copolymer as claimed in claim 1 consisting of (1) acrylamide, (2) maleic acid or its anhydride and (3) N,N''-methylene-bis-acrylamide or ethylene diacrylate in a weight ratio (1) : (2) : (3) of 3 : 0.05 - 4 : 0.075 - 0.9.
Claim 3
Dependent Claim
21 words
A polymer as claimed in claim 1 wherein the weight ratio a : d is 3 to not more than 0.45.
Claim 4
Dependent Claim
22 words
A polymer as claimed in claim 1, wherein the weight ratio a : d is 3 : 0.6 to 3 : 0.9.
Claim 5
Dependent Claim
24 words
A polymer as claimed in claim 1 wherein the weight ratio a : (b + c) is 3 : 0.5 to 3 : 1.0.
Claim 6
Dependent Claim
20 words
A copolymer as claimed in claim 1, wherein the dicarboxylic acid residues present are in the form of the anhydride.
Claim 7
Dependent Claim
64 words
A polymer as claimed in claim 1 consisting of (a) acrylamide, (b) a copolymer of ethylene-maleic acid or its anhydride, (c) maleic acid or its anhydride, and (d) N,N''-methylene-bis-acrylamide or ethylene diacrylate; in a weight ratio a:b:c:d of 3 : 0.5 - 1.5 : 0.05 - 4 : 0.075 - 0.9, the weight ratio a : (b + c) being not more than 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |