US2483875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally stable colorimeter
Assignee: Individual
•
Filing: 1946-08-29
•
Granted: 1949-10-04
•
Expires: 1966-08-29
Abstract
No abstract record available.
Inventors
- 👤 William J Boyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1147501A
Cited
US1729239A
Cited
US2282741A
Cited
US2193437A
Cited
US2273356A
Cited
US2356238A
Cited
US2424858A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |