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US2917828A
Expired / Lapsed
US
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Dental drill
Assignee: Chayes Dental Instrument Corp
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Filing: 1957-09-26
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Granted: 1959-12-22
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Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 Richard W Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:55
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/02; A61C1/05; A61C1/052; A61C1/08; A61C1/14; A61C1/141
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923777A
Cited
GB515349A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |