US3476482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opacimeter for comparing light from different areas of sample sheet
Assignee: Conrac Corp
•
Filing: 1967-09-27
•
Granted: 1969-11-04
•
Expires: 1987-09-27
Abstract
No abstract record available.
Inventors
- 👤 Robert C Howard
- 👤 Dale C Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/86; G01N21/17; G01N21/47; G01N21/4738; G01N21/474; G01N2021/4742
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2471750A
Cited
US3244894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |