US2424858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colorimeter
Assignee: Individual
•
Filing: 1945-01-25
•
Granted: 1947-07-29
•
Expires: 1965-01-25
Abstract
No abstract record available.
Inventors
- 👤 Jurg A Senn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251; G01N21/255
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2036447A
Cited
US1951018A
Cited
US2073223A
Cited
US2134982A
Cited
US2191026A
Cited
US2268133A
Cited
US2301419A
Cited
US2372937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |