US3703583A
Expired / Lapsed
US
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Anticalculus formulations
Assignee: Lever Brothers Co
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Filing: 1971-06-10
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Granted: 1972-11-21
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Expires: 1991-06-10
Abstract
Abstract DENTAL FORMULATIONS, SUCH AS TOOTH PASTE, TOOTH POWDER, AND MOUTH WASH, CONTAINING ANTICALCULUS AGENTS SELECTED FROM THE GROUP CONSISTING OF N-METHYL-N-DOLECYLN-(2-HYDROXYETHYL)-N-BENZYL AMMONIUM CHLORIDE, NMETHYL-N-(2-HYDROXYDODECYL)-N-(2-HYDROXYETHYL)-NBENZYL AMMONIUM CHLORIDE, N-METHYL-N-METHYL-N-(2-HYDROXYTETRADECYL)-N-(2-HYDROXYETHYL-N-BENZYL AMMONIUM CHLORIDE, AND DI-ISOBUTYPHENOXY-ETHOXY/ETHYLDIMETHYL-BENZYL AMMONIUM CHLORIDE, ARE DISCLOSED.
Inventors
- 👤 Donald J Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/416
Claims Analysis
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |