Patent US3584116A successfully refreshed from Google Patents.
US3584116A
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Oral compositions for calculus retardation
Assignee: Procter and Gamble Co
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Filing: 1967-12-11
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Granted: 1971-06-08
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Expires: 1987-12-11
Abstract
Abstract ORAL COMPOSITIONS, SUCH AS TOOTHPASTE, MOUTHWASH, AND THE LIKE, CONTAINING CERTAIN PERFLUORO-1,2-DIPHOSPHONOCYCLOALK-1,2-ENES AND SALTS THEREOF, WHICH RETARD DENTAL CALCULUS FORMATION WITHOUT DAMAGING TOOTH STRUCTURE.
Inventors
- 👤 Marion D Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:32
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/55; A61K8/69; A61K8/70
Claims Analysis
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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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |