US3371933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound producing device
Assignee: Individual
•
Filing: 1965-10-19
•
Granted: 1968-03-05
•
Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Dorothea M Weitzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1218324A
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US1746959A
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US1747733A
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US2224358A
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US2579872A
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US2930624A
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US3136072A
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US3112569A
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US3289325A
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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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |