Patent US3535557A successfully refreshed from Google Patents.
US3535557A
Expired / Lapsed
US
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Storage time subtraction circuit
Assignee: Ltv Electrosystems Inc
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Filing: 1967-09-05
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Granted: 1970-10-20
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Expires: 1987-09-05
Abstract
No abstract record available.
Inventors
- 👤 Jimmy D Rogers
- 👤 Joseph J Wormser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/04; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03K17/00; H03K17/04; H03K17/041; H03K17/0412; H03K17/04126; H03K5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3421099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |