US1136838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective call device.
Assignee: Hall Switch & Signal Co
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Filing: 1912-08-26
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Granted: 1915-04-20
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Expires: 1932-08-26
Abstract
No abstract record available.
Inventors
- 👤 Harry O Rugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:49
CPC Classifications
H; H03; H03M; H03M1/00; H04; H04L; H04L15/00; H04L15/04; H04L15/22
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) | 1918-04-19 | 1918-10-19 | 1919-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1922-04-19 | 1922-10-19 | 1923-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1926-04-19 | 1926-10-19 | 1927-04-20 | $7700.00 | Window Closed / Lapsed |