US2485608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse modulator
Assignee: Unisys Corp
•
Filing: 1943-05-24
•
Granted: 1949-10-25
•
Expires: 1963-05-24
Abstract
No abstract record available.
Inventors
- 👤 David Y Keim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/543
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1978461A
Cited
GB460562A
Cited
US2153756A
Cited
US2276994A
Cited
US2212420A
Cited
US2295585A
Cited
US2351439A
Cited
US2405070A
Cited
US2405069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |