US2978951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system of color monitoring
Assignee: PROCTOR SILEX CORP
•
Filing: 1958-02-13
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Granted: 1961-04-11
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Expires: 1978-02-13
Abstract
No abstract record available.
Inventors
- 👤 John S Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:36
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/463; G01J3/02; G01J3/0205; G01J3/0224; G01J3/50; G01J3/501; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/2496; Y10T137/2499; Y10T137/2509
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1792752A
Cited
US2186203A
Cited
US2209764A
Cited
US2328461A
Cited
DE812967C
Cited
US2682801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |