US3723612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizer for radioactive colloidal solutions
Assignee: Institut Biofiziki
•
Filing: 1969-08-08
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Granted: 1973-03-27
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Expires: 1989-08-08
Abstract
Abstract A stabilizer for radioactive colloidal solutions prepared from three gelatin fractions of varying molecular weights. It is prepared by heating the fractions with water, sodium chloride and succinic anhydride followed by neutralization and bacterial filtration.
Inventors
- 👤 N Mikheev
- 👤 M Gracheva
- 👤 L Bogomolova
- 👤 V Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:50
CPC Classifications
A; A61; A61K; A61K51/00; A61K51/12; A61K51/1217; A61K47/00; A61K47/30; A61K47/42; A61K2123/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
A method of making a stabilizer as claimed in claim 1 comprising freeing the solution of calcium and magnesium ions.
Claim 2
Dependent Claim
20 words
A method of making a stabilizer as claimed in claim 1 comprising combining the thusly obtained stabilizer with other stabilizers.
Claim 3
Dependent Claim
19 words
A method of making a stabilizer as claimed in claim 1, comprising combining the thusly obtained stabilizer with saccharides.
Claim 4
Dependent Claim
11 words
The stabilizer prepared according to the method claimed in claim 1.
Claim 5
Dependent Claim
18 words
The stabilizer claimed in claim 5 combined with a colloidal solution prepared by the condensation or reduction methods.
Claim 6
Dependent Claim
13 words
The stabilizer claimed in claim 5 combined with medical or radioactive colloidal solutions.
References Cited (Backward Citations)
US3127313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |