Patent US3887712A successfully refreshed from Google Patents.
US3887712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oral hygiene products
Assignee: Merck and Co Inc
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Filing: 1973-06-15
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Granted: 1975-06-03
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Expires: 1993-06-15
Abstract
Abstract Alexidine dihydrofluoride is useful in the treatment of dental plaque, calculus, gingivitis, caries and related periodontal disease.
Inventors
- 👤 Myron J Lover
- 👤 Joseph P Speranza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:25
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/69; A61K8/40; A61K8/43; A61Q; A61Q11/00; C; C07; C07C; C07C279/00; C07C279/20; C07C279/24; C07C279/26; C07C279/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A LIQUID ORAL HYGIENE COMPOSITION FOR USE IN DILUTED FORM IN AN ORAL IRRIGATION DEVICE FOR THE PREVENTION OF DENTAL PLAQUE, CALCULUS, GINGIVITIS, CARIES AND RELATED PERIODONAL DISEASE COMPRISING AS ACTIVE INGREDIENT, ALEXIDINE DIHYDROFLUORIDE IN CONCENTRATION 1 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
40 words
A LIQUID ORAL HYGIENE COMPOSITION FOR USE IN DILUTED FORM IN AN ORAL IRRIGATION DEVICE FOR THE PREVENTION OF DENTAL PLAQUE, CALCULUS, GINGIVITIS, CARIES AND RELATED PERIODONAL DISEASE COMPRISING AS ACTIVE INGREDIENT, ALEXIDINE DIHYDROFLUORIDE IN CONCENTRATION 1 PERCENT BY WEIGHT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |