Patent US3649608A successfully refreshed from Google Patents.
US3649608A
Expired / Lapsed
US
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Process for the production of shaped articles particularly dental prostheses
Assignee: Bayer AG
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Filing: 1969-07-23
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Granted: 1972-03-14
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Expires: 1989-07-23
Abstract
Abstract A PROCES FOR USE IN THE PRODUCTION OF DENTAL PROSTHESES, WHEREIN 25-27 PARTS BY WEIGHT OF A LIQUID CONSISTING PREDOMINANTLY OF MONOMERIC METHYL METHACRYLATE AND 73-75 PARTS BY WEIGHT OF A POLYMERPOWDER ARE MIXED TOGETHER. THE USE OF A POLYMER POWDER COMPRISING 85-60 PARTS OF A POLYMER OF METHACRYLIC ACID AND 40-15 PARTS OF AN ACRYLIC ACID ESTER/METHYL METHACRYLATE OR METHACRYLIC ACID ESTER/METHYL METHACRYLATE COPOLYMER, WHERE THE ESTER CONTENT IN THE COPOLYMER, THE MOLECULAR WEIGHT OF THE POLYMER AND COPOLYMER ARE REQUIRED TO BE WITHIN SPECIFIED RANGES RESULTS IN A RAPID START OF PROCESSING AND A PROCESSING TIME OF AT LEAST AN HOUR.
Inventors
- 👤 Heino Logemann
- 👤 Paul-Gunther Bruckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
C; C08; C08F; C08F265/00; C08F265/04; C08F265/06; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |