US3559288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental fillings and devices composed of a polycarbonate filled with presized glass fibers
Assignee: Bayer AG
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Filing: 1969-07-16
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Granted: 1971-02-02
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Expires: 1989-07-16
Abstract
Abstract A DENTAL FILLING OR DENTAL PROSTHESIS DEVICE HAVING AN ESSENTIAL STRUCTURAL ELEMENT COMPOSED OF A THERMOPLASTIC, HIGH MOLECULAR WEIGHT POLYCARBONATE AND FROM 5 TO 40 PERCENT GLASS FIBERS PRESIZED WITH A THERMOPLASTIC, HIGH MOLECULAR WEIGHT POLYCARBONATE OR WATER AND A METHOD OF MAKING SAME.
Inventors
- 👤 Hans-Joachim Rehberg
- 👤 Hermann Schnell
- 👤 Wilhelm Hechelhammer
- 👤 Hugo Streib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:31
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/891
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |