Patent US3512092A successfully refreshed from Google Patents.
US3512092A
Expired / Lapsed
US
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Apparatus for synthesizing sine waves
Assignee: Individual
•
Filing: 1967-06-21
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Granted: 1970-05-12
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Expires: 1987-06-21
Abstract
No abstract record available.
Inventors
- 👤 Duncan Philip Thurnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/26; G06G7/28; G06G7/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2621295A
Cited
US2566085A
Cited
US2748278A
Cited
US2850668A
Cited
US3002142A
Cited
US3081434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |