Patent US2745813A successfully refreshed from Google Patents.
US2745813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and material for taking impressions, especially for dental purposes
Assignee: Bayer AG
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Filing: 1950-11-09
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Granted: 1956-05-15
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Expires: 1970-11-09
Abstract
No abstract record available.
Inventors
- 👤 Logemann Heino
- 👤 Graulich Wilhelm
- 👤 Becker Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A MATERIAL FOR TAKING IMPRESSIONS FOR DENTAL PURPOSES COMPRISING A MIXTURE OF A COMPOUND (A) SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE AND ACRYLIC ACID, AND A COMPOUND (B) SELECTED FROM THE GROUP CONSISTING OF ALKYLENE DIACRYLAMIDE, ALKYLENE DIMETHACRYLAMIDE AND HEXABYDRO-1,3,5-TRIACRYLYL-S-TRIAZINE, A SOLVENT FOR THE COMPOUNDS (A) AND (B) FORMING A GEL WITH SAID COMPOUNDS DURING THE POLYMERIZATION AND A POLYMERIZATION CATALYST CAPABLE OF EFFECTING POLYMERIZATION AT TEMPERATURES NOT EXCEEDING ABOUT 45* C.
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) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |