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US931331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone-key.
Assignee: AT&T Inc
•
Filing: 1907-11-23
•
Granted: 1909-08-17
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Expires: 1927-11-23
Abstract
No abstract record available.
Inventors
- 👤 James L Mcquarrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:04
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
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) | 1912-08-16 | 1913-02-15 | 1913-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-08-16 | 1917-02-15 | 1917-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-08-16 | 1921-02-15 | 1921-08-17 | $7700.00 | Window Closed / Lapsed |