US1376604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing photo-electric cells
Assignee: Individual
•
Filing: 1920-08-27
•
Granted: 1921-05-03
•
Expires: 1940-08-27
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:21
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/04; H01J40/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1924-05-02 | 1924-11-01 | 1925-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-05-02 | 1928-11-01 | 1929-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-05-02 | 1932-11-01 | 1933-05-03 | $7700.00 | Window Closed / Lapsed |