Patent US2149717A successfully refreshed from Google Patents.
US2686452A
Expired / Lapsed
US
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Color matching apparatus
Assignee: INSTR DEV LAB Inc
•
Filing: 1948-07-21
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Granted: 1954-08-17
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Expires: 1968-07-21
Abstract
No abstract record available.
Inventors
- 👤 Edward P Bentley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:04
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/0205; G01J3/0251; G01J3/04; G01J3/46; G01J3/50; G01J3/51; G01J1/00; G01J1/10; G01J1/20; G01J1/34; G01J1/36; G01J2003/466; G01J3/0232; G01J3/0262; G01J3/465
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |