Patent US2574264A successfully refreshed from Google Patents.
US2574264A
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Color and color difference meter
Assignee: HENRY A GARDNER LAB Inc
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Filing: 1949-03-04
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Granted: 1951-11-06
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Expires: 1969-03-04
Abstract
No abstract record available.
Inventors
- 👤 Richard S Hunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:55
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J3/02; G01J3/0205; G01J3/0251; G01J3/513; G01J3/52; G01J3/524; G01J2003/466; G01J3/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2064517A
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US2245034A
Cited
US2375966A
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Cited
US2417321A
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US2471750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |