Patent US2693105A successfully refreshed from Google Patents.
Patent US2165925A successfully refreshed from Google Patents.
US2165925A
Expired / Lapsed
US
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Automatic billing system
Assignee: AT&T Inc
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Filing: 1933-11-15
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Granted: 1939-07-11
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Expires: 1953-11-15
Abstract
No abstract record available.
Inventors
- 👤 Charles L Goodrum
- 👤 Edward E Hinrichsen
- 👤 Keller Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:24
CPC Classifications
H; H04; H04M; H04M15/00; H04M15/38
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) | 1942-07-10 | 1943-01-09 | 1943-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-10 | 1947-01-09 | 1947-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-10 | 1951-01-09 | 1951-07-11 | $7700.00 | Window Closed / Lapsed |