US3268348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression materials
Assignee: Individual
•
Filing: 1965-09-23
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Granted: 1966-08-23
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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
2026-10-23 19:53
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A DENTAL IMPRESSION COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL ALGINATE, CALCIUM SULPHATE DIHYDRATE, A METAL FLUORIDE AND AN INERT FILLER COMPRISING DIATOMACEOUS EARTH, A RETARDER CONSISTING OF SODIUM PYROPHOSPHATE, A NEUTRALIZER CONSISTING OF MAGNESIUM OXIDE, THE SAID FLUORIDE CONSISTING OF BARIUM FLUORIDE AND BEING PRESENT IN AN AMOUNT OF FROM ABOUT 1% TO ABOUT 10%, SAID FLUORIDE BEING ADAPTED TO ELIMINATE FIXING OF SAID COMPOSITION WHILE MAINTAINING CONTROLLED SETTING TIME AND MINIMIZING DETERIORATION WITH AGE, AND TO PROVIDE SMOOTH AND ACCURATE IMPRESSIONS AND CASTS.
Claim 2
Dependent Claim
102 words
A DENTAL IMPRESSION COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF AN ALKALI METAL ALGINATE, HYDRATED CALCIUM SULPHATE, A METAL FLUORIDE AND AN INERT FILLER AND A METAL OXIDE NEUTRALIZER, THE SAID FLUORIDE CONSISTING OF BARIUM FLUORIDE COMBINED WITH ANOTHER FLUORIDE SELECTED FROM THE GROUP CONSISING OF POTASSIUM FLUORIDE, SODIUM FLUORIDE, LITHIUM FLUORIDE, MAGNESIUM FLUORIDE, ALUMINUM FLUORIDE AND ZINE FLUORIDE AND BEING PRESENT IN A TOTAL AMOUNT OF FROM ABOUT 1% TO ABOUT 10% SAID FLUORIDE BEING ADAPTED TO ELIMINATING FIXING OF SAID COMPOSITION WHILE MAINTAINING CONTROLLED SETTING TIME AND MINIMIZING DETERIORATION WITH AGE, AND TO PROVIDE SMOOTH AND ACCURATE IMPRESSIONS 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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |