US3865723A
Expired / Lapsed
US
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Method to form stable complexes of polyanions occurring in biological liquids
Assignee: MARCHISIO MARIA A MRS
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Filing: 1973-03-21
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Granted: 1975-02-11
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Expires: 1993-03-21
Abstract
Abstract Polymers with polyamidic-aminic structure able to form complexes with polyanions occurring in biological liquids and process for their preparation. A method to complex and thus neutralize or eliminate polyanions occurring in biological liquids is taught and apparatus to carry out this method is disclosed.
Inventors
- 👤 Maria Antonietta Marchisio
- 👤 Paolo Ferruti
- 👤 Tito Longo
- 👤 Ferdinando Danusso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; Y; Y10; Y10S; Y10S530/00; Y10S530/827; Y10S530/829; Y10S530/83
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A METHOD OF TREATING BLOOD TO FIRMLY COMPLEX, NETURALIZE AND THEREBY ELIMINATE HEPARIN OCCURRING THEREIN, COMPRISING ADJUSTING THE BLOOD TO A PH BETWEEN 3 AND 10, CONTACTING SAID PH ADJUSTED BLOOD FOR A TIME RANGING FROM ABOUT 1 TO 600 SECONDS WITH A POLYMER COMPRISING MONOMERIC UNITS DERIVED FROM: A. THE GROUP CONSISTING OF BIS-ACRYL-PIPERAZINES AND ALIPHATIC BIS ACRYL AMIDES OF THE FORMULA
Claim 2
Independent Claim
63 words
A METHOD OF TREATING BLOOD TO FIRMLY COMPLEX, NETURALIZE AND THEREBY ELIMINATE HEPARIN OCCURRING THEREIN, COMPRISING ADJUSTING THE BLOOD TO A PH BETWEEN 3 AND 10, CONTACTING SAID PH ADJUSTED BLOOD FOR A TIME RANGING FROM ABOUT 1 TO 600 SECONDS WITH A POLYMER COMPRISING MONOMERIC UNITS DERIVED FROM: A. THE GROUP CONSISTING OF BIS-ACRYL-PIPERAZINES AND ALIPHATIC BIS ACRYL AMIDES OF THE FORMULA
Claim 3
Dependent Claim
29 words
A method according to claim 1, wherein the polymer is soluble in blood and comprises at least one monomeric unit derived from each of the groups A and B.
Claim 4
Dependent Claim
30 words
A method according to claim 1, wherein the polymer is soluble in blood and comprises at least one monomeric unit derived from each of the groups A, B and C.
Claim 5
Dependent Claim
24 words
A method according to claim 1, wherein the polymer is a regular addition copolymer of 1,4-bis-acrylyl piperazine, N,N-dimethylene diamine, glycine, allylamine and N-vinyl pyrrolidone.
Claim 6
Dependent Claim
32 words
A method according to claim 1, wherein the polymer is cross-linked and insoluble in blood and comprises at least one monomeric unit derived from each of the groups A, B and C.
Claim 7
Dependent Claim
33 words
A method according to claim 1, wherein the polymer is cross-linked and insoluble in blood and comprises at least one monomeric unit derived from each of the groups A, B, C and D.
Claim 8
Dependent Claim
34 words
A method according to claim 1, wherein the polymer is cross-linked and insoluble in blood and comprises at least one monomeric unit derived from each of the groups A, B, C, D and E.
Claim 9
Dependent Claim
16 words
A method according to claim 5, wherein the polymer is in the form of solid granules.
Claim 10
Dependent Claim
16 words
A method according to claim 6, wherein the polymer is in the form of solid granules.
Claim 11
Dependent Claim
16 words
A method according to claim 7, wherein the polymer is in the form of solid granules.
References Cited (Backward Citations)
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Cited
US3577534A
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US3635909A
Cited
US3773739A
Cited
US3766104A
Cited
US3730888A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |