US3392324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant current circuit for determination of printed circuit acceptability
Assignee: International Business Machines Corp
•
Filing: 1965-12-29
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Granted: 1968-07-09
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Expires: 1985-12-29
Abstract
No abstract record available.
Inventors
- 👤 Hermann Karl
- 👤 Warren R Wrenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:06
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/2832; G01R31/2836; G01R31/2839; G01R31/2841; G01R31/2801; G01R31/2806; G01R31/50; G01R31/66; G01R31/67; H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/2805
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3114872A
Cited
US3317817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |