US2034334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoelectric cell
Assignee: Individual
•
Filing: 1931-07-29
•
Granted: 1936-03-17
•
Expires: 1951-07-29
Abstract
No abstract record available.
Inventors
- 👤 Falkenthal Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/01; H10D48/04; H10D48/047; H10D48/043; H10F; H10F99/00; H10P; H10P14/00; H10P14/20; H10P14/22; H10P14/34; H10P14/3402; Y; Y10; Y10S; Y10S136/00; Y10S136/291; Y10S136/293
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) | 1939-03-17 | 1939-09-16 | 1940-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-03-17 | 1943-09-16 | 1944-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-03-17 | 1947-09-16 | 1948-03-17 | $7700.00 | Window Closed / Lapsed |