US3500140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multichannel integrated devices consisting of darlington circuits
Assignee: Hitachi Ltd
•
Filing: 1968-06-05
•
Granted: 1970-03-10
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Expires: 1988-06-05
Abstract
No abstract record available.
Inventors
- 👤 Tsugio Makimoto
- 👤 Yuichi Teranishi
- 👤 Tuguyuki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/18; H; H03; H03F; H03F3/00; H03F3/72; H03K; H03K17/00; H03K17/08; H03K17/081; H03K17/08112; H03K17/16; H03K17/51; H03K17/56; H03K17/60; H03K17/615; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H10D84/613; H10D84/615; Y; Y10; Y10S; Y10S148/00; Y10S148/026; Y10S148/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2663806A
Cited
US2663830A
Cited
US3103599A
Cited
US3209214A
Cited
US3210677A
Cited
US3263178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |