Patent US2631082A successfully refreshed from Google Patents.
US2631082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead sulfate impression materials
Assignee: Dental Perfection Co
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Filing: 1952-03-28
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Granted: 1953-03-10
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Expires: 1972-03-28
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 22:25
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
AN IMPRESSION COMPOSITION CAPABLE OF FORMING A AQUEOUS SOLUTION AN ELASTIC GEL, COMPRISING A GEL-FORMING AGENT OF THE GROUP CONSISTING OF A WATER-SOLUBLE ALGINATE, GELLABLE PECTIN MATERIAL AND CARBOXY METHYL CELLULOSE, AND A LEAD BASIC SULPHATE REACTIVE THEREWITH.
Claim 2
Dependent Claim
38 words
AN IMPRESSION COMPOSITION CAPABLE OF FORMING A AQUEOUS SOLUTION AN ELASTIC GEL, COMPRISING A GEL-FORMING AGENT OF THE GROUP CONSISTING OF A WATER-SOLUBLE ALGINATE, GELLABLE PECTIN MATERIAL AND CARBOXY METHYL CELLULOSE, AND A LEAD BASIC SULPHATE REACTIVE THEREWITH.
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) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |