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US4446052A
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Aqueous gel containing tricalcium di(1-hydroxy-3-aminopropane-1,1-diphosphonate
Assignee: Procter and Gamble Co
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Filing: 1982-05-17
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Granted: 1984-05-01
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Expires: 2002-05-17
Abstract
Abstract Calcium 1-hydroxy-3-aminopropane-1,1-diphosphonate forms a gel when mixed with water. As compared to soluble salts of APD, the gel provides slow systemic release and reduced tissue damage when used in the treatment of certain disorders in warm blooded animals.
Inventors
- 👤 Richard J. Sunberg
- 👤 James J. Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:32
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3839; C07F9/3873; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/55; A61P; A61P43/00; A61Q; A61Q11/00; Y; Y10; Y10S; Y10S424/00; Y10S424/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
An aqueous gel containing from about 0.01% to about 3% tricalcium di(1-hydroxy-3-aminopropane-1,1-diphosphonate).
Claim 2
Dependent Claim
12 words
An aqueous gel containing from about 0.01% to about 3% tricalcium di(1-hydroxy-3-aminopropane-1,1-diphosphonate).
Claim 3
Dependent Claim
14 words
The gel of claim 1 containing from about 0.05% to about 1% tricalcium di(1-hydroxy-3-aminopropane-1,1-diphosphonate).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |