US2628153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoride-containing impression materials
Assignee: Dental Perfection Co
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Filing: 1952-04-07
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Granted: 1953-02-10
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Expires: 1972-04-07
Abstract
No abstract record available.
Inventors
- 👤 Stanley E Noyes
- 👤 Edwin H Lochridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:23
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A DENTAL IMPRESSION COMPOSITION COMPRISING A GEL-FORMING COMPONENT OF THE GROUP CONSISTING OF A WATER-SOLUBLE ALGINATE, A GELLABLE PECTIN MATERIAL AND CARBOXY METHYL CELLULOSE, A METALLIC SALT COMPONENT REACTIVE WITH SAID GEL-FORMING COMPONENT IN SOLUTION TO FORM AN ELASTIC GEL IMPRESSION AGAINST WHICH A PLASTER CASTING MATERIAL MAY BE POURED, AND AN ALKALI METAL FLOURIDE UNIFORMLY DISTRIBUTED WITHIN THE COMPOSITION AND OPERABLE THEREWITH TO CAUSE FORMATION OF A HARD AND SMOOTH PLASTER SURFACE AT THE IMPRESSIONCAST INTERFACE.
Claim 2
Dependent Claim
77 words
A DENTAL IMPRESSION COMPOSITION COMPRISING A GEL-FORMING COMPONENT OF THE GROUP CONSISTING OF A WATER-SOLUBLE ALGINATE, A GELLABLE PECTIN MATERIAL AND CARBOXY METHYL CELLULOSE, A METALLIC SALT COMPONENT REACTIVE WITH SAID GEL-FORMING COMPONENT IN SOLUTION TO FORM AN ELASTIC GEL IMPRESSION AGAINST WHICH A PLASTER CASTING MATERIAL MAY BE POURED, AND AN ALKALI METAL FLOURIDE UNIFORMLY DISTRIBUTED WITHIN THE COMPOSITION AND OPERABLE THEREWITH TO CAUSE FORMATION OF A HARD AND SMOOTH PLASTER SURFACE AT THE IMPRESSIONCAST INTERFACE.
References Cited (Backward Citations)
US2422497A
Cited
US2568752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |