Patent US2680816A successfully refreshed from Google Patents.
US2680816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film badge radiation detector
Assignee: Individual
•
Filing: 1951-03-12
•
Granted: 1954-06-08
•
Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 Kurt G Stern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/08; Y; Y10; Y10S; Y10S430/00; Y10S430/154
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US456396A
Cited
US1512827A
Cited
US1556499A
Cited
US1922823A
Cited
US2258593A
Cited
US2253231A
Cited
US2322044A
Cited
US2380244A
Cited
US2483991A
Cited
US2505346A
Cited
US2496218A
Cited
US2520077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |