US3328880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicious dental filling
Assignee: Eagle Chemical Co
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Filing: 1966-05-27
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Granted: 1967-07-04
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Schlesinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:05
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/849; A61K6/853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN THE PROCESS OF FILLING A MOIST TOOTH CAVITY IN THE MOUTH OF A PATIENT WITN A SILICIOUS DENTAL CEMENT FILLING COMPRISING POWDERED SILICIOUS MATERIAL AND PHOSPHORIC ACID, THE IMPROVEMENT COMPRISING MIXING SAID POWDERED SILICIOUS MATERIALS WITH AN AMOUNT OF A LIQUID SILICATE ESTER SUFFICIENT TO PRODUCE A PASTE OF PROPER CONSISTENCY AND THEREAFTER ADDING PHOSPHORIC ACID, WHEREBY THE CEMENT MIXTURE WILL NOT SET UNTIL THE PHOSPHORIC ACID IS ADDED THERETO; THE LIQUID SILICATE ESTER ALSO INCREASING THE SILICA CONTENT OF THE FILLING.
Claim 2
Dependent Claim
83 words
IN THE PROCESS OF FILLING A MOIST TOOTH CAVITY IN THE MOUTH OF A PATIENT WITN A SILICIOUS DENTAL CEMENT FILLING COMPRISING POWDERED SILICIOUS MATERIAL AND PHOSPHORIC ACID, THE IMPROVEMENT COMPRISING MIXING SAID POWDERED SILICIOUS MATERIALS WITH AN AMOUNT OF A LIQUID SILICATE ESTER SUFFICIENT TO PRODUCE A PASTE OF PROPER CONSISTENCY AND THEREAFTER ADDING PHOSPHORIC ACID, WHEREBY THE CEMENT MIXTURE WILL NOT SET UNTIL THE PHOSPHORIC ACID IS ADDED THERETO; THE LIQUID SILICATE ESTER ALSO INCREASING THE SILICA CONTENT OF THE FILLING.
References Cited (Backward Citations)
US3247593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |