US4568535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for periodontal administration
Assignee: Individual
•
Filing: 1984-07-16
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Granted: 1986-02-04
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Expires: 2004-07-16
Abstract
Abstract A composition for periodontal administration and a method of periodontal treatment involving a slow release device which can be placed directly into the periodontal pocket where metronidazole, with or without antioxidants, are released over periods of days to weeks at a cidal concentration for anaerobes in the domain of the periodontal pocket.
Inventors
- 👤 Walter J. Loesche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:39
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0053; A61K9/0063
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A film contoured to be cut to approximate the dimension of a periodontal pocket for the treatment of bacterial infections of the periodontum wherein the film consists essentially of a mixture of: 80 to 98 parts by weight of ethylcellulose, 1 to 20 parts by weight of metronidazole, 0.1 to 1 part by weight of an antioxidant selected from the group consisting of ascorbic acid, sodium thiosulfate, dithiothreitol, cysteine, thioglycollate and glutathione.
Claim 2
Dependent Claim
72 words
A film contoured to be cut to approximate the dimension of a periodontal pocket for the treatment of bacterial infections of the periodontum wherein the film consists essentially of a mixture of: 80 to 98 parts by weight of ethylcellulose, 1 to 20 parts by weight of metronidazole, 0.1 to 1 part by weight of an antioxidant selected from the group consisting of ascorbic acid, sodium thiosulfate, dithiothreitol, cysteine, thioglycollate and glutathione.
Claim 3
Dependent Claim
30 words
A method of inhibiting the growth of a bacterial infection of the periodontum by placing locally into the periodontal pocket an antibacterial effective amount of the film of claim 1.
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) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |