US3512893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color difference meter
Assignee: EIDP Inc
•
Filing: 1967-12-18
•
Granted: 1970-05-19
•
Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 Mark E Faulhaber
- 👤 Peter G Witherell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:24
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/465; G01J3/52; G01J3/524; G01J2003/466; G01J3/50; G01J3/51; G01J3/513
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3233087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |