Patent US3501837A successfully refreshed from Google Patents.
US3501837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental impression tray,primarily for posterior teeth
Assignee: Individual
•
Filing: 1966-06-10
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Granted: 1970-03-24
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Expires: 1986-06-10
Abstract
No abstract record available.
Inventors
- 👤 Alexander Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:42
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2583170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |