US3467475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densitometer incorporating selectively and individually controlled color filters
Assignee: Gretag AG
•
Filing: 1968-09-09
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Granted: 1969-09-16
•
Expires: 1988-09-09
Abstract
No abstract record available.
Inventors
- 👤 Tino Celio
- 👤 Heinrich Hogg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36; G01J1/22; G01J1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3340764A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |