US2469852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating photoelectric devices
Assignee: Hartford National Bank and Trust Co
•
Filing: 1946-07-16
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Granted: 1949-05-10
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Expires: 1966-07-16
Abstract
No abstract record available.
Inventors
- 👤 Strutt Maximiliaan Julius Otto
- 👤 Ziel Aldert Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:26
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F1/28; H01; H01J; H01J40/00; H01J40/02; H01J40/14; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1809676A
Cited
US2082627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |