US3404240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repertory dial impulse system using a magnetic memory
Assignee: NEC Corp
•
Filing: 1965-06-22
•
Granted: 1968-10-01
•
Expires: 1985-06-22
Abstract
No abstract record available.
Inventors
- 👤 Shinohara Takeo
- 👤 Nomura Keisaku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:01
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/274; H04M1/276
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3291917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |