US3343291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone accessory
Assignee: Individual
•
Filing: 1965-12-01
•
Granted: 1967-09-26
•
Expires: 1985-12-01
Abstract
No abstract record available.
Inventors
- 👤 Carmen W Levang
- 👤 Neil D Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:47
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US835844A
Cited
US1398771A
Cited
US1710207A
Cited
FR664953A
Cited
US2116507A
Cited
FR823078A
Cited
US2846159A
Cited
US3195242A
Cited
US3292289A
Cited
US3286388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |