Patent US881691A successfully refreshed from Google Patents.
US881691A
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Mandrel for dental engines.
Assignee: Individual
•
Filing: 1907-05-23
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Granted: 1908-03-10
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Expires: 1927-05-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:56
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/06; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1083; Y10T279/1087; Y10T279/17; Y10T279/17128; Y10T279/17136; Y10T279/17153; Y10T407/00; Y10T407/19; Y10T407/1906
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) | 1911-03-10 | 1911-09-09 | 1912-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-03-10 | 1915-09-09 | 1916-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-03-10 | 1919-09-09 | 1920-03-10 | $7700.00 | Window Closed / Lapsed |