US3291618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression materials
Assignee: Individual
•
Filing: 1965-09-23
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Granted: 1966-12-13
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Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Jacque C Morrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:13
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A DENTAL IMPRESSION COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL ALGINATE, CALCIUM SULPHATE, A METAL FLUORIDE, A BASIC NEUTRALIZING SUBSTANCE OF LOW WATER SOLUBILITY IN AN AMOUNT OF ABOUT 1% TO ABOUT 10% OF THE SAID COMPOSITION AND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDRATED OXIDES OF MAGNESIUM, CALCIUM, AND BARIUM, AN INERT FILLER AND A RETARDER, THE SAID FLUORIDE CONSISTING ESSENTIALLY OF ZINC FLUORIDE AS THE SOLE ADDED FLUORIDE IN SAID COMPOSITION NECESSARY TO OBTAIN THE DESIRED RESULTS AND BEING PRESENT IN AN AMOUNT OF FROM ABOUT 1% TO ABOUT 10%, SAID COMPOSITION BEING ADAPTED TO ELIMINATE FIXING WHILE MAINTAINING CONTROLLED SETTING TIME AND MINIMIZING DETERIORATION WITH AGE AND ENVIRONMENTAL EXPOSURE, AND TO PROVIDE SMOOTH AND ACCURATE IMPRESSION AND CASTS.
Claim 2
Dependent Claim
127 words
A DENTAL IMPRESSION COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL ALGINATE, CALCIUM SULPHATE, A METAL FLUORIDE, A BASIC NEUTRALIZING SUBSTANCE OF LOW WATER SOLUBILITY IN AN AMOUNT OF ABOUT 1% TO ABOUT 10% OF THE SAID COMPOSITION AND SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND HYDRATED OXIDES OF MAGNESIUM, CALCIUM, AND BARIUM, AN INERT FILLER AND A RETARDER, THE SAID FLUORIDE CONSISTING ESSENTIALLY OF ZINC FLUORIDE AS THE SOLE ADDED FLUORIDE IN SAID COMPOSITION NECESSARY TO OBTAIN THE DESIRED RESULTS AND BEING PRESENT IN AN AMOUNT OF FROM ABOUT 1% TO ABOUT 10%, SAID COMPOSITION BEING ADAPTED TO ELIMINATE FIXING WHILE MAINTAINING CONTROLLED SETTING TIME AND MINIMIZING DETERIORATION WITH AGE AND ENVIRONMENTAL EXPOSURE, AND TO PROVIDE SMOOTH AND ACCURATE IMPRESSION AND CASTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |