Patent US1568694A successfully refreshed from Google Patents.
US1568694A
Expired / Lapsed
US
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Photo-electric device
Assignee: General Electric Co
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Filing: 1921-04-16
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Granted: 1926-01-05
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Expires: 1941-04-16
Abstract
No abstract record available.
Inventors
- 👤 William A Ruggles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06
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) | 1929-01-04 | 1929-07-06 | 1930-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-01-04 | 1933-07-06 | 1934-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-01-04 | 1937-07-06 | 1938-01-05 | $7700.00 | Window Closed / Lapsed |