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Patent US2719966A successfully refreshed from Google Patents.
US2719966A
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US
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Electronic annunciator
Assignee: Electric Controller and Manufacturing Co LLC
•
Filing: 1951-11-01
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Granted: 1955-10-04
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Expires: 1971-11-01
Abstract
No abstract record available.
Inventors
- 👤 Schurr Charles Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2057531A
Cited
GB545982A
Cited
US2478908A
Cited
US2576574A
Cited
US2558637A
Cited
US2614160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |