US2980834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging of photo-conductive insulating material
Assignee: Bruning Charles Co Inc
•
Filing: 1956-04-26
•
Granted: 1961-04-18
•
Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 John L Tregay
- 👤 John J Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0208; G03G15/0216; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR539861A
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US2588699A
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US2624652A
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US2608176A
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US2543051A
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US2740184A
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US2811465A
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US2774921A
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US2833930A
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US2834132A
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US2892973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |