US3506507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a metal foil pattern by etching
Assignee: Northern Engraving Co Inc
•
Filing: 1967-11-22
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Granted: 1970-04-14
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Expires: 1987-11-22
Abstract
No abstract record available.
Inventors
- 👤 Adrian P Brietzke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:30
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02; H; H05; H05K; H05K3/00; H05K3/10; H05K3/20; H05K3/0011; H05K3/0017; H05K3/0023; H05K3/02; H05K3/06; H05K3/061; H05K3/38; H05K3/386
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3006795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |