US3247593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicious dental filling
Assignee: Eagle Chemical Co
•
Filing: 1963-03-29
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Granted: 1966-04-26
•
Expires: 1983-03-29
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Schlesinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:28
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/849; A61K6/853
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE PROCESS OF INSERTING ACIDIC SILICIOUS DENTAL CEMENT CONSISTING ESSENTIALLY OF A CLAY POWDER AND PHOSPHORIC ACID INTO A TOOTH CAVITY TO FORM A DENTAL PORCELAIN FILLING, THE METHOD WHICH COMPRISES APPLYING A LOWER ALKYL LIQUID SILICATE ESTER OVER THE ENTIRE PREPARED SURFACE OF SAID TOOTH CAVITY, INSERTING SAID DENTAL CEMENT INTO THE SAID PREPARED CAVITY AND CAUSING THE CEMENT TO SET.
Claim 2
Dependent Claim
63 words
IN THE PROCESS OF INSERTING ACIDIC SILICIOUS DENTAL CEMENT CONSISTING ESSENTIALLY OF A CLAY POWDER AND PHOSPHORIC ACID INTO A TOOTH CAVITY TO FORM A DENTAL PORCELAIN FILLING, THE METHOD WHICH COMPRISES APPLYING A LOWER ALKYL LIQUID SILICATE ESTER OVER THE ENTIRE PREPARED SURFACE OF SAID TOOTH CAVITY, INSERTING SAID DENTAL CEMENT INTO THE SAID PREPARED CAVITY AND CAUSING THE CEMENT TO SET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |