US3725113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood compatible microencapsulated detoxicants and method for making
Assignee: Research Corp
•
Filing: 1970-12-17
•
Granted: 1973-04-03
•
Expires: 1990-12-17
Abstract
Abstract Blood compatible microencapsulated detoxicants suitable for the detoxification of blood in an extracorporeal shunt are made by coating a solid detoxicant with a semipermeable polymer membrane and then coating the membrane with a non-interfering layer of a blood compatible protein.
Inventors
- 👤 T Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:51
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/44; A61K9/00; A61K9/48; A61K9/50; A61K9/5073
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
A composition according to claim 1 wherein the solid detoxicant is charcoal.
Claim 2
Dependent Claim
13 words
A composition according to claim 2 wherein the semipermeable polymer membrane is collodion.
Claim 3
Independent Claim
60 words
A method for making a microencapsulated detoxicant composition adapted for reaction in an extracorporeal shunt with waste metabolites and toxIns found in blood which comprises coating a solid detoxicant with a semipermeable polymer membrane having an effective pore size permitting waste metabolites and toxins to diffuse therethrough and then coating with a permeable outer layer of a blood compatible protein.
References Cited (Backward Citations)
US3522346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |