Patent US3023889A successfully refreshed from Google Patents.
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 22:07
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1048966A
Cited
US1774258A
Cited
US2110237A
Cited
US2315415A
Cited
US2354402A
Cited
US2492326A
Cited
US2527992A
Cited
US2527991A
Cited
US2799935A
Cited
US2795850A
Cited
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 |