US2546483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone dial index attachment
Assignee: Individual
•
Filing: 1948-04-26
•
Granted: 1951-03-27
•
Expires: 1968-04-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Venters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:08
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US809445A
Cited
US1491331A
Cited
US1620077A
Cited
US1708479A
Cited
US1765445A
Cited
US2068271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |