US3020361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic engraving apparatus
Assignee: Individual
•
Filing: 1956-01-23
•
Granted: 1962-02-06
•
Expires: 1976-01-23
Abstract
No abstract record available.
Inventors
- 👤 Jerry B Minter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:16
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H04; H04R; H04R3/00; H04R3/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1916162A
Cited
US1960007A
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US2161489A
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US2162986A
Cited
US2182136A
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US2239717A
Cited
US2373181A
Cited
US2413971A
Cited
US2475200A
Cited
US2746130A
Cited
US2854529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |