US3399331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical device and contacts
Assignee: International Business Machines Corp
•
Filing: 1964-12-24
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Granted: 1968-08-27
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Expires: 1984-12-24
Abstract
No abstract record available.
Inventors
- 👤 Walter E Mutter
- 👤 Edward D Purcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:59
CPC Classifications
H; H10; H10P; H10P95/00; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; H01; H01B; H01B1/00; H10W; H10W20/00; H10W20/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |