Patent US1333744A successfully refreshed from Google Patents.
US1333744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone-transmitter
Assignee: AT&T Inc
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Filing: 1916-12-20
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Granted: 1920-03-16
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Expires: 1936-12-20
Abstract
No abstract record available.
Inventors
- 👤 Edward C Wente
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:23
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22
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) | 1923-03-16 | 1923-09-15 | 1924-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-03-16 | 1927-09-15 | 1928-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-03-16 | 1931-09-15 | 1932-03-16 | $7700.00 | Window Closed / Lapsed |