US3147552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous dental matrix unit
Assignee: Individual
•
Filing: 1961-12-26
•
Granted: 1964-09-08
•
Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Sanford D Goldman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:14
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A DENTAL MATRIX UNIT COMPRISING A STRIP OF THIN, FLEXIBLE METAL HAVING A FIRST END PORTION AND A SECOND END PORTION, SAID STRIP BEING FORMED INTO A CYLINDRICAL SHAPE BY CIRCUMFERENTIALLY OVERLAPPING SAID END PORTIONS, WITH SAID END PORTIONS BEING PIVOTALLY SECURED TOGETHER IN SUCH A MANNER THAT SAID SECOND END PORTION PROVIDES A REMOVAL TAB ADJACENT THE PIVOTAL SECUREMENT, SAID PIVOTAL SECUREMENT BEING UNITARY WITH SAID STRIP AND COMPRISING A STAKE FASTENER, SAID DENTAL MATRIX UNIT BEING OF A SIZE TO SNUGLY SURROUND A TOOTH, WHEREBY A TIGHT FIT AROUND THE TOOTH CAN BE OBTAINED BY TELESCOPING SAID MATRIX UNIT OVER SAID TOOTH, WITH SAID PIVOTAL SECUREMENT PROVIDING A SELF-CLAMPING ACTION.
Claim 2
Dependent Claim
112 words
A DENTAL MATRIX UNIT COMPRISING A STRIP OF THIN, FLEXIBLE METAL HAVING A FIRST END PORTION AND A SECOND END PORTION, SAID STRIP BEING FORMED INTO A CYLINDRICAL SHAPE BY CIRCUMFERENTIALLY OVERLAPPING SAID END PORTIONS, WITH SAID END PORTIONS BEING PIVOTALLY SECURED TOGETHER IN SUCH A MANNER THAT SAID SECOND END PORTION PROVIDES A REMOVAL TAB ADJACENT THE PIVOTAL SECUREMENT, SAID PIVOTAL SECUREMENT BEING UNITARY WITH SAID STRIP AND COMPRISING A STAKE FASTENER, SAID DENTAL MATRIX UNIT BEING OF A SIZE TO SNUGLY SURROUND A TOOTH, WHEREBY A TIGHT FIT AROUND THE TOOTH CAN BE OBTAINED BY TELESCOPING SAID MATRIX UNIT OVER SAID TOOTH, WITH SAID PIVOTAL SECUREMENT PROVIDING A SELF-CLAMPING ACTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |