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US2037191A
Expired / Lapsed
US
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Registering device
Assignee: AT&T Inc
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Filing: 1932-09-30
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Granted: 1936-04-14
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Expires: 1952-09-30
Abstract
No abstract record available.
Inventors
- 👤 Franklyn E Backer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:28
CPC Classifications
G; G06; G06M; G06M7/00; G06M7/02; G06M7/04; G06M1/00; G06M1/08; G06M1/10; G06M1/101
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) | 1939-04-14 | 1939-10-14 | 1940-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-14 | 1943-10-14 | 1944-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-14 | 1947-10-14 | 1948-04-14 | $7700.00 | Window Closed / Lapsed |