US3846306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonding of enzymes,enzyme derivatives and other biologically active molecules to polymeric materials
Assignee: KOCH-LIGHT Ltd
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Filing: 1971-12-10
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Granted: 1974-11-05
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Expires: 1991-12-10
Abstract
Abstract 1. IN A HYDROPHILIC WATER-INSOLUBLE POLYMER HAVING ATTACHED THERETO BIOLOGICALLY-ACTIVE MOLECULES ALONG ITS MOLECULAR CHAINS THE IMPROVEMENT WHICH COMPRISES REPEATING DISULPHIDE, THIOL OR THIOLACTONE SIDE GROUPINGS ON SAID MOLECULAR CHAIN WHEREIN THE BIOLOGICALLY-ACTIVE MOLECULES ARE REACTED WITH SAID SIDE GROUPINGS TO ATTACH SAID BIOLOGICALLY-ACTIVE MOLECULES TO THE POLYMER, SAID IMPROVED POLYMER CHARACTERIZED BY BEING REGENERABLE OR READILY ACTIVATED.
Inventors
- 👤 S Barker
- 👤 C Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/04; C07D277/06; C12; C12N; C12N11/00; C12N11/02; C12N11/08; C12N11/082; C12N11/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN A HYDROPHILIC WATER-INSOLUBLE POLYMER HAVING ATTACHED THERETO BIOLOGICALLY-ACTIVE MOLECULES ALONG ITS MOLECULAR CHAINS THE IMPROVEMENT WHICH COMPRISES REPEATING DISULPHIDE, THIOL OR THIOLACTONE SIDE GROUPINGS ON SAID MOLECULAR CHAIN WHEREIN THE BIOLOGICALLY-ACTIVE MOLECULES ARE REACTED WITH SAID SIDE GROUPINGS TO ATTACH SAID BIOLOGICALLY-ACTIVE MOLECULES TO THE POLYMER, SAID IMPROVED POLYMER CHARACTERIZED BY BEING REGENERABLE OR READILY ACTIVATED.
Claim 2
Dependent Claim
57 words
IN A HYDROPHILIC WATER-INSOLUBLE POLYMER HAVING ATTACHED THERETO BIOLOGICALLY-ACTIVE MOLECULES ALONG ITS MOLECULAR CHAINS THE IMPROVEMENT WHICH COMPRISES REPEATING DISULPHIDE, THIOL OR THIOLACTONE SIDE GROUPINGS ON SAID MOLECULAR CHAIN WHEREIN THE BIOLOGICALLY-ACTIVE MOLECULES ARE REACTED WITH SAID SIDE GROUPINGS TO ATTACH SAID BIOLOGICALLY-ACTIVE MOLECULES TO THE POLYMER, SAID IMPROVED POLYMER CHARACTERIZED BY BEING REGENERABLE OR READILY ACTIVATED.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |