US2491382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric impulse generator
Assignee: DICK E STEARNS
•
Filing: 1948-05-12
•
Granted: 1949-12-13
•
Expires: 1968-05-12
Abstract
No abstract record available.
Inventors
- 👤 Robert H Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:31
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/54; H02M7/58; H02M7/62; H03; H03K; H03K3/00; H03K3/02; H03K3/53
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085100A
Cited
USRE22572E
Cited
US2145724A
Cited
US2269460A
Cited
US2411898A
Cited
US2428390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |