US3463885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speech and sound display system
Assignee: Individual
•
Filing: 1965-10-22
•
Granted: 1969-08-26
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Hubert W Upton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:50
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/181; H03F3/183; G; G02; G02C; G02C11/00; G02C11/10; G02C7/00; G02C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2150364A
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US3170979A
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US3286031A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |