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US3515887A
Expired / Lapsed
US
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Optical scanner including at least one gunn-effect oscillator element
Assignee: AT&T Inc
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Filing: 1967-11-20
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Granted: 1970-06-02
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Expires: 1987-11-20
Abstract
No abstract record available.
Inventors
- 👤 Robert Rosenberg
- 👤 Harry J Schulte Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:14
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/01; G02F1/015
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3027806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |