Patent US3525796A successfully refreshed from Google Patents.
US3525796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic musical instrument provided with generators and individual formant filters
Assignee: US Philips Corp
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Filing: 1967-11-03
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Granted: 1970-08-25
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Expires: 1987-11-03
Abstract
No abstract record available.
Inventors
- 👤 Nico Valentinus Franssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:51
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H1/14; G10H1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1666066A
Cited
US1960893A
Cited
US2166202A
Cited
US2489497A
Cited
US3098407A
Cited
US3205294A
Cited
US3403361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |