Patent US2420570A successfully refreshed from Google Patents.
US2420570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental restoration, including artificial teeth and dentures
Assignee: Individual
•
Filing: 1941-11-29
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Granted: 1947-05-13
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Expires: 1961-11-29
Abstract
No abstract record available.
Inventors
- 👤 Max S Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:57
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US589385A
Cited
US1105476A
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US1219019A
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US1223450A
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US1333007A
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US1384282A
Cited
DE568573C
Cited
GB435536A
Cited
US2234993A
Cited
US2163014A
Cited
US2230164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-12 | 1950-11-11 | 1951-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-12 | 1954-11-11 | 1955-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-12 | 1958-11-11 | 1959-05-13 | $7700.00 | Window Closed / Lapsed |