US2375889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color grading apparatus
Assignee: PACIFIC CLAY PRODUCTS Co
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Filing: 1941-08-29
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Granted: 1945-05-15
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Expires: 1961-08-29
Abstract
No abstract record available.
Inventors
- 👤 Benning Wilbert Orville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:28
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/50; G01J3/51; G01J2003/466; G01J3/463
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-05-14 | 1948-11-13 | 1949-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-05-14 | 1952-11-13 | 1953-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-05-14 | 1956-11-13 | 1957-05-15 | $7700.00 | Window Closed / Lapsed |