Patent US3423835A successfully refreshed from Google Patents.
US3423835A
Expired / Lapsed
US
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Dental matrix clamp
Assignee: M S V Inc
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Filing: 1966-10-12
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Granted: 1969-01-28
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Expires: 1986-10-12
Abstract
No abstract record available.
Inventors
- 👤 Paul D Mattern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:15
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/80; A61C5/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US339072A
Cited
US2519246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |