US1998950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for electron discharge devices
Assignee: General Electric Co
•
Filing: 1932-02-25
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Granted: 1935-04-23
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Expires: 1952-02-25
Abstract
No abstract record available.
Inventors
- 👤 William D Cockrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:27
CPC Classifications
B; B26; B26D; B26D5/00; B26D5/20; B26D5/30; B26D5/34; B26D7/00; B26D7/01; B26D7/015; B41; B41F; B41F33/00; B41F33/04; B41F33/14; B41F33/18; B65; B65B; B65B41/00; B65B41/18; G; G01; G01B; G01B11/00; G01B11/02; G01B11/04; G01B11/043; H; H01; H01J; H01J40/00; H01J40/02; H01J40/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49769; Y10T29/49789; Y10T29/49798; Y10T29/49995; Y10T29/49996
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) | 1938-04-22 | 1938-10-22 | 1939-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-22 | 1942-10-22 | 1943-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-22 | 1946-10-22 | 1947-04-23 | $7700.00 | Window Closed / Lapsed |