Patent US2922134A successfully refreshed from Google Patents.
US2857671A
Expired / Lapsed
US
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Dental grinding instrument
Assignee: Individual
•
Filing: 1956-11-13
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Granted: 1958-10-28
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Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 Milton E Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:03
CPC Classifications
A; A61; A61C; A61C3/00; A61C3/02; A61C1/00; A61C1/02; A61C1/05; A61C1/052
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2697878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |