US3455751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making printed circuits and the like by step-by-step etching
Assignee: Buckbee Mears Co
•
Filing: 1965-07-12
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Granted: 1969-07-15
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Expires: 1985-07-12
Abstract
No abstract record available.
Inventors
- 👤 John J Frantzen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:39
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0277; H05K1/028; C; C23; C23F; C23F1/00; C23F1/02; H05K3/00; H05K3/0011; H05K3/0017; H05K3/002; H05K3/02; H05K3/06; H05K2201/00; H05K2201/09; H05K2201/09009; H05K2201/09063; H05K2203/00; H05K2203/03; H05K2203/0369; H05K2203/05; H05K2203/0548; H05K2203/0554; H05K2203/14; H05K2203/1476
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3186883A
Cited
US3346415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |