Patent US2409837A successfully refreshed from Google Patents.
US1209253A
Expired / Lapsed
US
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Impulse-transmitting device.
Assignee: Automatic Electric Co
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Filing: 1913-01-09
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Granted: 1916-12-19
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Expires: 1933-01-09
Abstract
No abstract record available.
Inventors
- 👤 John G Blessing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:20
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/31; H04M1/34; H03; H03M; H03M1/00
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) | 1919-12-19 | 1920-06-19 | 1920-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1923-12-19 | 1924-06-19 | 1924-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1927-12-19 | 1928-06-19 | 1928-12-19 | $7700.00 | Window Closed / Lapsed |