US2178197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric exposure meter
Assignee: Individual
•
Filing: 1938-10-27
•
Granted: 1939-10-31
•
Expires: 1958-10-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Bing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:31
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/02; G01J1/04; G01J1/0403; G01J1/0407; G01J1/044; G01J1/06; G01J1/42; G01J1/4209; G01J1/4214; G01J1/0233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-10-30 | 1943-05-01 | 1943-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-10-30 | 1947-05-01 | 1947-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-10-30 | 1951-05-01 | 1951-10-31 | $7700.00 | Window Closed / Lapsed |