Patent US3546491A successfully refreshed from Google Patents.
US3546491A
Expired / Lapsed
US
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Solid state scanner utilizing a thermal filament
Assignee: CARL N BERGLUND
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Filing: 1967-11-16
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Granted: 1970-12-08
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Expires: 1987-11-16
Abstract
No abstract record available.
Inventors
- 👤 Carl N Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
G; G06; G06K; G06K11/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2832898A
Cited
US2889469A
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US3047743A
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US3181080A
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US3121177A
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US3167663A
Cited
US3469154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |