US2729569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental cements
Assignee: Individual
•
Filing: 1952-12-12
•
Granted: 1956-01-03
•
Expires: 1972-12-12
Abstract
No abstract record available.
Inventors
- 👤 Lipkind Henry
- 👤 Rogoff Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/80; A61K6/802; A61K6/807; A61K6/15; A61K6/17; A61K6/849; A61K6/853; A61K6/864
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE IMPROVEMENT IN THE CLASS OF DENTAL COMPOSITIONS SUITABLE AS FILLING AND APPLICABLE IN DENTAL RESTORATION WORK, WHICH COMPRISES INTEGRALLY INCORPORATING INTO SAID COMPOSITIONS FROM 0.05% TO 5.0% BY WEIGHT OF A WATER SOLUBLE ALKALI METAL SALT OF AN ALKYL SILICONIC ACID IN WHICH THE ALKYL GROUP IS CHARACTERIZED BY HAVING FROM 1 TO 6 CARBON ATOMS AND IN WHICH THE RATIO OF ALKALI METAL TO SILICON IS FROM 2:1 TO 1:1.
Claim 2
Dependent Claim
72 words
THE IMPROVEMENT IN THE CLASS OF DENTAL COMPOSITIONS SUITABLE AS FILLING AND APPLICABLE IN DENTAL RESTORATION WORK, WHICH COMPRISES INTEGRALLY INCORPORATING INTO SAID COMPOSITIONS FROM 0.05% TO 5.0% BY WEIGHT OF A WATER SOLUBLE ALKALI METAL SALT OF AN ALKYL SILICONIC ACID IN WHICH THE ALKYL GROUP IS CHARACTERIZED BY HAVING FROM 1 TO 6 CARBON ATOMS AND IN WHICH THE RATIO OF ALKALI METAL TO SILICON IS FROM 2:1 TO 1:1.
References Cited (Backward Citations)
USRE21779E
Cited
US1450467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |