US3421020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step voltage generator
Assignee: Siemens AG
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Filing: 1966-05-25
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Granted: 1969-01-07
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Otmar Ringelhaan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:26
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/25; G06G7/04; H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/044; H03; H03M; H03M1/00; H03M1/12; H03M1/34; H03M1/38; H03M1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |