Patent US3416865A successfully refreshed from Google Patents.
US3416865A
Expired / Lapsed
US
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Optical density measuring system
Assignee: Xerox Corp
•
Filing: 1964-11-27
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Granted: 1968-12-17
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Expires: 1984-11-27
Abstract
No abstract record available.
Inventors
- 👤 Stephen E Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:22
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/22; G01J1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1921862A
Cited
US2185690A
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US2292230A
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FR894581A
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US2834247A
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US3060318A
Cited
US3328587A
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US3319512A
Cited
US3270348A
Cited
US3340764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |