US2761998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse lengthening circuit
Assignee: Unisys Corp
•
Filing: 1952-08-14
•
Granted: 1956-09-04
•
Expires: 1972-08-14
Abstract
No abstract record available.
Inventors
- 👤 Chen Tung Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:46
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/37; H03K5/00; H03K5/01; H03K5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2231695A
Cited
GB522986A
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US2414686A
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US2450032A
Cited
US2433254A
Cited
US2497505A
Cited
US2575516A
Cited
US2646534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |