US3441352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorimeter using interchangeable meters
Assignee: Nuclear Chicago Corp
•
Filing: 1965-01-25
•
Granted: 1969-04-29
•
Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Leonard A Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251; G01N21/253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2970267A
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US2157438A
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US2245124A
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US2384350A
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US2424858A
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US2483875A
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US3286583A
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US3271112A
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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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |