US2914996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic unit for producing printed circuits
Assignee: Sprague Electric Co
•
Filing: 1953-06-03
•
Granted: 1959-12-01
•
Expires: 1973-06-03
Abstract
No abstract record available.
Inventors
- 👤 Frederick H Whitham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:18
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/207; G; G03; G03G; G03G15/00; G03G15/22; G03G15/221; G03G15/224; G03G15/65; G03G15/6582; G03G15/6585; G03G15/6588; G03G15/6591; H05K3/12; H05K3/1266; H05K1/00; H05K1/02; H05K1/09; H05K1/092; H05K1/095; H05K2203/00; H05K2203/05; H05K2203/0502; H05K2203/0517; H05K3/0097; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |