US3023889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in preparing dental amalgams
Assignee: Individual
•
Filing: 1958-05-05
•
Granted: 1962-03-06
•
Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 Roy E Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:23
CPC Classifications
A; A61; A61C; A61C5/00; A61C5/60; A61C5/66; A61C5/68; B; B01; B01F; B01F31/00; B01F31/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1048966A
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US1774258A
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US2110237A
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US2315415A
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US2354402A
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US2492326A
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US2799935A
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US2795850A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |