Patent US2447985A successfully refreshed from Google Patents.
US2447985A
Expired / Lapsed
US
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Device for determining photoelectrically the concentration of a solute in a solvent
Assignee: Individual
•
Filing: 1945-06-25
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Granted: 1948-08-24
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Expires: 1965-06-25
Abstract
No abstract record available.
Inventors
- 👤 Mass Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
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)
US2022327A
Cited
US2084267A
Cited
US2157438A
Cited
US2193315A
Cited
US2193437A
Cited
US2232169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |