US2478163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Logarithmic photometer
Assignee: GAF Chemicals Corp
•
Filing: 1944-12-30
•
Granted: 1949-08-02
•
Expires: 1964-12-30
Abstract
No abstract record available.
Inventors
- 👤 Sweet Monroe Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/005; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; H; H01; H01J; H01J43/00; H01J43/04; H01J43/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227095A
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US2093166A
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US2227031A
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US2231697A
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US2290775A
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US2361549A
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US2407564A
Cited
US2417023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |