US3466446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-operated sound-signal telephone transmitter and transmission system
Assignee: Stromberg Carlson Corp
•
Filing: 1966-06-21
•
Granted: 1969-09-09
•
Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Matthew Fassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:36
CPC Classifications
H; H04; H04B; H04B10/00; H04R; H04R23/00; H04R23/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1997628A
Cited
US2254022A
Cited
US2376493A
Cited
US2345445A
Cited
US2951736A
Cited
US3036153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-08 | 1973-03-10 | 1973-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-08 | 1977-03-10 | 1977-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-08 | 1981-03-10 | 1981-09-09 | $7700.00 | Window Closed / Lapsed |