US2831978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to be used in the radiography of teeth
Assignee: Individual
•
Filing: 1956-07-16
•
Granted: 1958-04-22
•
Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Narvestad Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:36
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G03B42/04; G03B42/042; A; A61; A61B; A61B6/00; A61B6/08; A61B6/50; A61B6/51; A61B6/512
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1398247A
Cited
US2753461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |