Patent US2816040A successfully refreshed from Google Patents.
US2816040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression material
Assignee: Kerr Corp
•
Filing: 1953-12-07
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Granted: 1957-12-10
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Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 Rabchuk Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:27
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A COMPOSITION CONSISTING ESSENTIALLY OF A GEL-FORMING AGENT OF THE CLASS CONSISTING OF WATER-SOLUBLE AIGINATES; PECTATES, PECTINS AND CARBOXY METHYL CELLULOSE AND DIBASIC LEAD PHOSPHITE.
Claim 2
Dependent Claim
25 words
A COMPOSITION CONSISTING ESSENTIALLY OF A GEL-FORMING AGENT OF THE CLASS CONSISTING OF WATER-SOLUBLE AIGINATES; PECTATES, PECTINS AND CARBOXY METHYL CELLULOSE AND DIBASIC LEAD PHOSPHITE.
References Cited (Backward Citations)
US2380739A
Cited
US2376467A
Cited
US2424895A
Cited
US2441729A
Cited
US2623808A
Cited
US2678280A
Cited
US2628153A
Cited
US2652312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |