US213662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in hand-pieces for dental engines
Assignee: —
•
Filing: —
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Granted: 1879-03-25
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Expires: 1896-03-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/08; A61C1/14; A61C1/141; Y; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17761; Y10T279/17786; Y10T279/17794
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1882-03-24 | 1882-09-23 | 1883-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1886-03-24 | 1886-09-23 | 1887-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1890-03-24 | 1890-09-23 | 1891-03-25 | $7700.00 | Window Closed / Lapsed |