US2489723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color comparator having a holder for reversing samples
Assignee: US Filter Wallace and Tiernan Inc
•
Filing: 1947-02-27
•
Granted: 1949-11-29
•
Expires: 1967-02-27
Abstract
No abstract record available.
Inventors
- 👤 Resnick Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:12
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/29; G01N21/293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US696371A
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US862870A
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US1659529A
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US1675967A
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US1986403A
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US1976672A
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US2046409A
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US2234499A
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US2423370A
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US2341810A
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US2386878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |