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Patent US2901400A successfully refreshed from Google Patents.
US2901400A
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Cryptocrystalline calcium pyrophosphate and dentifrice composition comprising the same
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-12-30
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Granted: 1959-08-25
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Expires: 1975-12-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas Fritts William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:03
CPC Classifications
A; A61; A61Q; A61Q11/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A DENTRIFRICE COMPOSITION CONTAINING A DENTAL-CARIESRETARDING WAER-SOLUBLE FLUORIDE AND AN EFFECTIVE DENTRIFICE POLISHING CONCENTRATION OF CALCIUM PYROPHOSPHATE, SAID PYROPHOSPHATE BEING IN THE FORM OF A PARTICULATE CRYPTOCRYSTALLINE SOLID HAVING AN AVERAGE PARTICLE SIZE BELOW ABOUT 5 MICRONS PREPARED BY THE SLOW MOLECULAR DEHYDRATION OF ANHYDROUS DICALCIUM ORTHOPHOSPHATE.
References Cited (Backward Citations)
GB191403034A
Cited
US2191199A
Cited
GB572352A
Cited
GB644360A
Cited
GB644339A
Cited
US2700012A
Cited
US2697024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |