US2449998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulator circuit
Assignee: Individual
•
Filing: 1943-07-22
•
Granted: 1948-09-28
•
Expires: 1963-07-22
Abstract
No abstract record available.
Inventors
- 👤 John C Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:55
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB400976A
Cited
US2181568A
Cited
US2221665A
Cited
US2289243A
Cited
US2280990A
Cited
US2295585A
Cited
US2221666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-28 | 1952-03-29 | 1952-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-28 | 1956-03-29 | 1956-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-28 | 1960-03-29 | 1960-09-28 | $7700.00 | Window Closed / Lapsed |