US2340376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency reducing system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1942-12-24
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Granted: 1944-02-01
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Expires: 1962-12-24
Abstract
No abstract record available.
Inventors
- 👤 Otho D Grandstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:58
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/32; H04; H04M; H04M19/00; H04M19/02; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44; H04Q1/442; H04Q1/4423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-01-31 | 1947-08-02 | 1948-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-01-31 | 1951-08-02 | 1952-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-01-31 | 1955-08-02 | 1956-02-01 | $7700.00 | Window Closed / Lapsed |