Patent US3509353A successfully refreshed from Google Patents.
US3509353A
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Assignee: Svenska Dataregister AB
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Filing: 1967-06-27
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Granted: 1970-04-28
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Expires: 1987-06-27
Abstract
No abstract record available.
Inventors
- 👤 Gunnar E Sundblad
- 👤 Tore Ameen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:27
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10831; G06K7/10881; G11; G11C; G11C13/00; G11C13/04; G11C13/048; G11C17/00; G11C17/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3258602A
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US3040661A
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US2933612A
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US3182291A
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US3227929A
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US3130317A
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US3247391A
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US3359405A
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US3349246A
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US3334236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-27 | 1973-10-27 | 1974-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-27 | 1977-10-27 | 1978-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-27 | 1981-10-27 | 1982-04-28 | $7700.00 | Window Closed / Lapsed |