US2901400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryptocrystalline calcium pyrophosphate and dentifrice composition comprising the same
Assignee: Monsanto Chemicals Ltd
•
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 07:13
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.
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GB191403034A
Cited
US2191199A
Cited
GB572352A
Cited
GB644360A
Cited
GB644339A
Cited
US2700012A
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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 |