Patent US3488847A successfully refreshed from Google Patents.
US3488847A
Expired / Lapsed
US
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Composite artificial ceramic tooth
Assignee: JOHN N PETTROW
•
Filing: 1967-03-20
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Granted: 1970-01-13
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 John N Pettrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:21
CPC Classifications
A; A61; A61C; A61C13/00; A61C13/08; A61C13/09; A61K; A61K6/00; A61K6/15; A61K6/16; A61K6/70; A61K6/78; A61K6/80; A61K6/802; A61K6/816; A61K6/818
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2302375A
Cited
US2897595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |