Patent US3137894A successfully refreshed from Google Patents.
US3137894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of crowns
Assignee: WILLIAM GETZ CORP
•
Filing: 1961-01-13
•
Granted: 1964-06-23
•
Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Jacob C Butler
- 👤 Getz William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:04
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/70; A61C5/77
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A DENTAL CROWN-MOLDING APPARATUS ADAPTED TO PRODUCE CROWNS CORRESPONDING TO A PREDETERMINED TOOTH SHAPE AND INCLUDING A PLURALITY OF PERMANENT MOLDS, SAID APPARATUS FURTHER COMPRISING FIRST AND SECOND HALVES, ELONGATED FIRST AND SECOND TROUGHS FORMED IN EACH OF SAID HALVES BEING ADAPTED TO FORM A HOLLOW SPACE IN SAID APPARATUS WHEN SAID HALVES ARE ASSEMBLED, RECESSED PORTIONS IN SAID FIRST HALF EXTENDING PERPENDICULARLY FROM SAID FIRST TROUGH AND HAVING ANATOMICALLY SHAPED CONTOURS CORRESPONDING TO THE LINGUAL CONTOUR OF SAID TEETH, RECESSED PORTIONS IN SAID SECOND HALF EXTENDING PERPENDICULARLY FROM SAID SECOND TROUGH AND HAVING ANATOMICALLY SHAPED CONTOURS CORRESPONDING TO THE LABIAL CONTOUR OF SAID TEETH, SAID RECESSED PORTIONS FORMING SAID PLURALITY OF MOLDS WHEN SAID HALVES ARE ASSEMBLED, CORE ELEMENTS ADAPTED FOR INSERTION INTO EACH OF SAID PERMANENT MOLDS WHEN SAID HALVES ARE ASSEMBLED, AND A BASE MEMBER SECUREDLY HOLDING EACH OF SAID CORE MEMBERS, SAID BASE MEMBER BEING RELEASABLY FITTED WITHIN SAID HOLLOW SPACE WHEN SAID HALVES ARE ASSEMBLED.
Claim 2
Dependent Claim
160 words
A DENTAL CROWN-MOLDING APPARATUS ADAPTED TO PRODUCE CROWNS CORRESPONDING TO A PREDETERMINED TOOTH SHAPE AND INCLUDING A PLURALITY OF PERMANENT MOLDS, SAID APPARATUS FURTHER COMPRISING FIRST AND SECOND HALVES, ELONGATED FIRST AND SECOND TROUGHS FORMED IN EACH OF SAID HALVES BEING ADAPTED TO FORM A HOLLOW SPACE IN SAID APPARATUS WHEN SAID HALVES ARE ASSEMBLED, RECESSED PORTIONS IN SAID FIRST HALF EXTENDING PERPENDICULARLY FROM SAID FIRST TROUGH AND HAVING ANATOMICALLY SHAPED CONTOURS CORRESPONDING TO THE LINGUAL CONTOUR OF SAID TEETH, RECESSED PORTIONS IN SAID SECOND HALF EXTENDING PERPENDICULARLY FROM SAID SECOND TROUGH AND HAVING ANATOMICALLY SHAPED CONTOURS CORRESPONDING TO THE LABIAL CONTOUR OF SAID TEETH, SAID RECESSED PORTIONS FORMING SAID PLURALITY OF MOLDS WHEN SAID HALVES ARE ASSEMBLED, CORE ELEMENTS ADAPTED FOR INSERTION INTO EACH OF SAID PERMANENT MOLDS WHEN SAID HALVES ARE ASSEMBLED, AND A BASE MEMBER SECUREDLY HOLDING EACH OF SAID CORE MEMBERS, SAID BASE MEMBER BEING RELEASABLY FITTED WITHIN SAID HOLLOW SPACE WHEN SAID HALVES ARE ASSEMBLED.
References Cited (Backward Citations)
US713330A
Cited
US1408533A
Cited
US2409783A
Cited
US2434416A
Cited
US2703435A
Cited
US2678470A
Cited
US2846725A
Cited
US3012287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |