Patent US3448275A successfully refreshed from Google Patents.
US3448275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical scanner with a photocell and a blocking diode in series
Assignee: International Business Machines Corp
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Filing: 1967-06-07
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Granted: 1969-06-03
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Expires: 1987-06-07
Abstract
No abstract record available.
Inventors
- 👤 Richard E Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:05
CPC Classifications
H; H10; H10F; H10F39/00; H10F39/10; H10F39/12; H10F39/18; H04; H04N; H04N25/00; H04N25/70; H04N25/701; H04N25/76; H04N25/779
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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |