Patent US2678469A successfully refreshed from Google Patents.
US2678469A
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Materials especially suitable for use in fabricating prosthetic appliances and dentures fabricated therefrom
Assignee: Individual
•
Filing: 1951-08-10
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Granted: 1954-05-18
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Expires: 1971-08-10
Abstract
No abstract record available.
Inventors
- 👤 Charles L Dimmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:02
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/01; A61C13/04; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A METHOD OF HOMOGENEOUSLY COMPOUNDING A COPOYLMER OF 96.0 TO 96.5 PER CENT BY WEIGHT OF STYRENE AND 3.5 TO 4. PER CENT BY WEIGHT OF BUTADIENE HAVING THE PHYSICAL PROPERTIES SET FORTH FOR RESIN A IN TABLE I HEREOF WITH A COPOLYMER OF ABOUT 75 PER CENT BY WEIGHT OF STYRENE AND ABOUT 25 PER CENT BY WEIGHT OF ALPHA-METHYL STYRENE HAVING PHYSICAL PROPERTIES AS SET FORTH FOR RESIN B IN TABLE I HEREOF FOR INJECTION MOLDING UNDER PRESSURES OF ABOUT 500 POUNDS PER SQUARE
References Cited (Backward Citations)
US1533625A
Cited
GB422232A
Cited
US2056796A
Cited
US2338607A
Cited
US2526654A
Cited
US2556459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |