Patent US2738528A successfully refreshed from Google Patents.
US2738528A
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Prophylactic dental handpiece
Assignee: Individual
•
Filing: 1952-08-05
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Granted: 1956-03-20
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Expires: 1972-08-05
Abstract
No abstract record available.
Inventors
- 👤 Sr David S Fridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
A; A61; A61C; A61C17/00; A61C17/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US689464A
Cited
US1759075A
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US1881129A
Cited
US2072620A
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US2160963A
Cited
US2108689A
Cited
US2226145A
Cited
US2400912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |