Patent US3447160A successfully refreshed from Google Patents.
US3447160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable headset
Assignee: Memorex Telex Corp
•
Filing: 1965-11-29
•
Granted: 1969-06-03
•
Expires: 1985-11-29
Abstract
No abstract record available.
Inventors
- 👤 Harry Teder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:18
CPC Classifications
H; H04; H04R; H04R5/00; H04R5/033; H04R5/0335; A; A61; A61F; A61F11/00; A61F11/06; A61F11/14; H04R1/00; H04R1/10; H04R1/1008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE446230C
Cited
US894258A
Cited
GB231643A
Cited
US2150703A
Cited
US2420245A
Cited
US3148376A
Cited
US3261028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |